Physics of Plasmas via MedWorm.com MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Physics of Plasmas' source. Mon, 06 Feb 2012 20:25:01 +0100 Dynamic mitigation of instabilities http://www.medworm.com/index.php?rid=5664601&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F024503%2F1%26agg%3Drss S. Kawata In the paper Phys. Plasmas 18, 092705 (2011), dynamic stabilization mechanism for the Rayleigh-Taylor instability was discussed together with another dynamic migration mechanism, which we proposed and is discussed further in a more general way in this paper. In general, a perturbation of physical qu ... [Phys. Plasmas 19, 024503 (2012)] published Mon Feb 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5664601 Tue, 07 Feb 2012 01:08:28 +0100 5664601 Nonlinear entropy transfer via zonal flows in gyrokinetic plasma turbulence http://www.medworm.com/index.php?rid=5664600&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022303%2F1%26agg%3Drss M. Nakata, T.-H. Watanabe, and H. Sugama Nonlinear entropy transfer processes in toroidal ion temperature gradient (ITG) and electron temperature gradient (ETG) driven turbulence are investigated based on the gyrokinetic entropy balance relations for zonal and non-zonal modes, which are coupled through the entropy transfer function regarde ... [Phys. Plasmas 19, 022303 (2012)] published Mon Feb 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5664600 Tue, 07 Feb 2012 01:08:28 +0100 5664600 Experimental investigation of geodesic acoustic mode spatial structure, intermittency, and interaction with turbulence in the DIII-D tokamak http://www.medworm.com/index.php?rid=5657157&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022301%2F1%26agg%3Drss J. C. Hillesheim, W. A. Peebles, T. A. Carter, L. Schmitz, and T. L. Rhodes Geodesic acoustic modes (GAMs) and zonal flows are nonlinearly driven, axisymmetric (m=0andn=0) E x B flows, which are thought to play an important role in establishing the saturated level of turbulence in tokamaks. Results are presented showing the GAM's observed spatial scales, temporal scales, an ... [Phys. Plasmas 19, 022301 (2012)] published Wed Feb 1, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657157 Sat, 04 Feb 2012 01:22:35 +0100 5657157 Magnetohydrodynamic instabilities in radial foil configurations http://www.medworm.com/index.php?rid=5657156&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022701%2F1%26agg%3Drss P.-A. Gourdain, J. B. Greenly, D. A. Hammer, B. R. Kusse, S. A. Pikuz et al. While detrimental to plasma performance, magnetohydrodynamic plasma instabilities in radial foil configurations do not preclude intense x-ray radiations from the central plasma column. As most of the plasma current flows there, the column pinches generating x-rays. However, pinch comes with a kink i ... [Phys. Plasmas 19, 022701 (2012)] published Wed Feb 1, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657156 Sat, 04 Feb 2012 01:22:35 +0100 5657156 Density dependence of capillary plasma on the pressure and applied voltage http://www.medworm.com/index.php?rid=5657155&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F024501%2F1%26agg%3Drss Han S. Uhm, Dong G. Jang, Min S. Kim, and Hyyong Suk Based on a simple theoretical model, the density properties of the electrical discharge in a capillary plasma system are investigated in terms of the hydrogen pressure and applied voltage. The electron density in the capillary during the electrical discharge is calculated from a theoretical model an ... [Phys. Plasmas 19, 024501 (2012)] published Wed Feb 1, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657155 Sat, 04 Feb 2012 01:22:35 +0100 5657155 Amended conjecture on an upper bound to time-dependent space-charge limited current http://www.medworm.com/index.php?rid=5657154&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F024502%2F1%26agg%3Drss M. E. Griswold, N. J. Fisch, and J. S. Wurtele Notwithstanding the recent conjecture that the upper bound on the time-averaged current across a space-charge-limited diode is equal to the steady state Child-Langmuir limit (J), Zhu and Ang used a one-dimensional (1D) particle in cell (PIC) code to show that in the regime where space charge effects ... [Phys. Plasmas 19, 024502 (2012)] published Wed Feb 1, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657154 Sat, 04 Feb 2012 01:22:35 +0100 5657154 Laser heating of finite two-dimensional dust clusters: B. Simulations http://www.medworm.com/index.php?rid=5657153&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F023701%2F1%26agg%3Drss Hauke Thomsen, Hanno Kahlert, Michael Bonitz, Jan Schablinski, Dietmar Block et al. Laser heating of monolayer dusty plasmas is investigated theoretically by Langevin dynamics simulations. The laser radiation pressure is used to externally control the dust temperature without changing the plasma properties. We show that the laser scanning pattern has a major influence on both the v ... [Phys. Plasmas 19, 023701 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657153 Sat, 04 Feb 2012 01:22:35 +0100 5657153 Characteristics of an underwater direct current discharge in bubbles and the temperature distribution in the bubbles http://www.medworm.com/index.php?rid=5657152&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F023501%2F1%26agg%3Drss Ranhua Xiong, Anton Yu. Nikiforov, Patrick Vanraes, and Christophe Leys An underwater direct current (DC) discharge in artificially produced air bubbles is investigated. Electrical and optical emission properties of the plasma and temperature distribution in bubbles evaluated by using computational fluid dynamics (CFD) are presented. The behavior of plasma inside a bubb ... [Phys. Plasmas 19, 023501 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657152 Sat, 04 Feb 2012 01:22:35 +0100 5657152 Suppression of higher mode excitation in a high gain relativistic klystron amplifier http://www.medworm.com/index.php?rid=5657151&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F023102%2F1%26agg%3Drss Y. Wu, Z. Xu, X. Jin, Z. H. Li, and C. X. Tang Suppressing higher mode excitation is very important in the high gain relativistic klystron amplifier because higher mode can seriously degrade klystron performance and cause pulse shortening. The mechanism of higher mode self-excitation is explored in the PIC simulation, and it is shown the couplin ... [Phys. Plasmas 19, 023102 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657151 Sat, 04 Feb 2012 01:22:35 +0100 5657151 Optical field-ionization of a neutral gas with inhomogeneous density for electron acceleration by a high-intensity laser http://www.medworm.com/index.php?rid=5657150&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F023103%2F1%26agg%3Drss Devki Nandan Gupta, Kunwar Pal Singh, and Hyyong Suk A scheme for the laser-induced acceleration of an electron from a double-ionizing neutral gas is investigated, where an inhomogeneous neutral gas profile (resembling a gas-jet experiment) is considered in order to observe the actual electron energy gain during acceleration. Optical-field ionization ... [Phys. Plasmas 19, 023103 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657150 Sat, 04 Feb 2012 01:22:35 +0100 5657150 Analysis on the exclusiveness of turbulence suppression between static and time-varying shear flow http://www.medworm.com/index.php?rid=5657149&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F020701%2F1%26agg%3Drss Y. Z. Zhang, T. Xie, and S. M. Mahajan The analytical theory of turbulence suppression by shear flow [Y. Z. Zhang and S. M. Mahajan, Phys. Fluids B 4, 1385 (1992)] is extended to analyze the combined actions of flows that have time-varying as well as static components. It is found that each component, appearing alone, may yield the same ... [Phys. Plasmas 19, 020701 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657149 Sat, 04 Feb 2012 01:22:35 +0100 5657149 Air plasma waveguide using pico-sec and nano-sec laser pulses http://www.medworm.com/index.php?rid=5657148&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F023502%2F1%26agg%3Drss We report a shock driven plasma in air breakdown using pump-probe to elucidate the hydrodynamic evolution of air plasma waveguide. Imaging of the evolution of air plasma plume is used to investigate the pump pulse effect on the plume dynamic. Imaging of the channeled pulse through evolved waveguide ... [Phys. Plasmas 19, 023502 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657148 Sat, 04 Feb 2012 01:22:35 +0100 5657148 Simulation studies of positron acceleration in a shock wave in a nonuniform external magnetic field http://www.medworm.com/index.php?rid=5657147&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022302%2F1%26agg%3Drss Takashi Iwata, Seiichi Takahashi, and Yukiharu Ohsawa Positron acceleration in a shock wave in an electron-positron-ion plasma is studied with one-dimensional, fully kinetic, electromagnetic particle simulations, with particular attention paid to the effect of inhomogeneity of external magnetic field B. First, acceleration to gamma ~ 10, where gamma is ... [Phys. Plasmas 19, 022302 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657147 Sat, 04 Feb 2012 01:22:35 +0100 5657147 X-pinch radiography for the radiation suppressed tungsten and aluminum planar wire array http://www.medworm.com/index.php?rid=5657146&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022702%2F1%26agg%3Drss J. Wu, L. P. Wang, J. J. Han, M. Li, L. Sheng et al. X-pinch radiography experiments were carried out on the 1 MA QiangGuang-1 facility to investigate the wire core behaviors of the tungsten and aluminum planar wire array. An axial quencher and over-massed loads were used to suppress keV radiation from the planar wire array. Two-wire 30 [mu]m Mo and/o ... [Phys. Plasmas 19, 022702 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657146 Sat, 04 Feb 2012 01:22:35 +0100 5657146 Reduced magnetohydrodynamic theory of oblique plasmoid instabilities http://www.medworm.com/index.php?rid=5657145&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F022101%2F1%26agg%3Drss S. D. Baalrud, A. Bhattacharjee, and Y.-M. Huang The three-dimensional nature of plasmoid instabilities is studied using the reduced magnetohydrodynamic equations. For a Harris equilibrium with guide field, represented by B=Btanh(x/lambda)y+Bz-hat, a spectrum of modes are unstable at multiple resonant surfaces in the current sheet, rather than jus ... [Phys. Plasmas 19, 022101 (2012)] published Fri Feb 3, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5657145 Sat, 04 Feb 2012 01:22:35 +0100 5657145 Magnetized and collimated millimeter scale plasma jets with astrophysical relevance http://www.medworm.com/index.php?rid=5644216&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012121%2F1%26agg%3Drss In this study, plasma collimated jets are formed from supersonic unmagnetized flows, mimicking a stellar ... [Phys. Plasmas 19, 012121 (2012)] published Tue Jan 31, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5644216 Tue, 31 Jan 2012 19:51:01 +0100 5644216 Beta dependence of electron heating in decaying whistler turbulence: Particle-in-cell simulations http://www.medworm.com/index.php?rid=5635955&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012312%2F1%26agg%3Drss S. Saito and S. Peter Gary Two-dimensional particle-in-cell simulations have been carried out to study electron beta dependence of decaying whistler turbulence and electron heating in a homogeneous, collisionless magnetized plasma. Initially, applied whistler fluctuations at relatively long wavelengths cascade their energy in ... [Phys. Plasmas 19, 012312 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635955 Sat, 28 Jan 2012 01:37:39 +0100 5635955 International thermonuclear experimental reactor-like extended Solovev equilibria with parallel flow http://www.medworm.com/index.php?rid=5635954&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014504%2F1%26agg%3Drss G. N. Throumoulopoulos and H. Tasso A Solovev-like equilibrium solution is extended to plasmas with incompressible flow parallel to the magnetic field. ITER-like configurations are constructed for Alfven Mach functions peaked either on or off the magnetic axis. The linear stability of the equilibrium is also examined by applying a suf ... [Phys. Plasmas 19, 014504 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635954 Sat, 28 Jan 2012 01:37:39 +0100 5635954 Saturation of a floating potential of an electron emitting electrode with increased electron emission: A one-dimensional kinetic model and particle-in-cell simulation http://www.medworm.com/index.php?rid=5635953&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013506%2F1%26agg%3Drss T. Gyergyek and J. KovaCiC A bounded plasma system is studied by a one-dimensional kinetic model and particle-in-cell computer simulation using the XPDP1 code. Three particle species are injected into the system from a planar source, which are the singly charged positive ions and the cool and the hot electrons. All the partic ... [Phys. Plasmas 19, 013506 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635953 Sat, 28 Jan 2012 01:37:39 +0100 5635953 Numerical analysis of radio-frequency sheath-plasma interactions in the ion cyclotron range of frequencies http://www.medworm.com/index.php?rid=5635952&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012508%2F1%26agg%3Drss H. Kohno, J. R. Myra, and D. A. D'Ippolito A new finite element numerical scheme for analyzing self-consistent radio-frequency (RF) sheath-plasma interaction problems in the ion cyclotron range of frequencies is applied to various problems represented by simplified models for the tokamak scrape-off layer. The present code incorporates a modi ... [Phys. Plasmas 19, 012508 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635952 Sat, 28 Jan 2012 01:37:39 +0100 5635952 Density gradient effects in weakly nonlinear ablative Rayleigh-Taylor instability http://www.medworm.com/index.php?rid=5635951&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012706%2F1%26agg%3Drss L. F. Wang (王立锋), W. H. Ye (叶文华), and X. T. He (贺贤土) In this research, density gradient effects (i.e., finite thickness of ablation front effects) in ablative Rayleigh-Taylor instability (ARTI), in the presence of preheating within the weakly nonlinear regime, are investigated numerically. We analyze the weak, medium, and strong ablation surfaces whic ... [Phys. Plasmas 19, 012706 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635951 Sat, 28 Jan 2012 01:37:39 +0100 5635951 Energetics of runaway electrons during tokamak disruptions http://www.medworm.com/index.php?rid=5635950&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012507%2F1%26agg%3Drss J. Riemann, H. M. Smith, and P. Helander In a tokamak disruption, a substantial fraction of the plasma current can be converted into runaway electrons. Although these are usually highly relativistic, their total energy is initially much smaller than that of the pre-disruption plasma. However, following a suggestion by Putvinski et al. [Pla ... [Phys. Plasmas 19, 012507 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635950 Sat, 28 Jan 2012 01:37:39 +0100 5635950 Symmetries of resistive two-fluid magnetohydrodynamics under reversals of toroidal field, current, and rotation http://www.medworm.com/index.php?rid=5635949&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014505%2F1%26agg%3Drss N. M. Ferraro The discrete symmetries of time-dependent, non-axisymmetric, two-fluid magnetohydrodynamics (MHD) equations are considered. Solutions of the time-independent, axisymmetric, ideal-MHD equations remain solutions under reversals of the toroidal field, current density, or rotation. Introducing non-axisy ... [Phys. Plasmas 19, 014505 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635949 Sat, 28 Jan 2012 01:37:39 +0100 5635949 Electron heat conduction under non-Maxwellian distribution in hohlraum simulation http://www.medworm.com/index.php?rid=5635948&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012313%2F1%26agg%3Drss Wen Yi Huo (霍文义), Ke Lan (蓝可), Pei Jun Gu (古培俊), Heng Yong (勇珩), and Qing Hong Zeng (曾清红) An electron transport model based on the non-Maxwellian distribution f[proportional]e (NM model), caused by the inverse bremsstrahlung heating, is used in 1-D plane target and 2-D hohlraum simulations. In the NM model, the electron heat flux depends not only on the gradient of electron temperature T ... [Phys. Plasmas 19, 012313 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635948 Sat, 28 Jan 2012 01:37:39 +0100 5635948 Exact self-similar solutions for the magnetized Noh Z pinch problem http://www.medworm.com/index.php?rid=5635947&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012707%2F1%26agg%3Drss A. L. Velikovich, J. L. Giuliani, S. T. Zalesak, J. W. Thornhill, and T. A. Gardiner A self-similar solution is derived for a radially imploding cylindrical plasma with an embedded, azimuthal magnetic field. The plasma stagnates through a strong, outward propagating shock wave of constant velocity. This analysis is an extension of the classic Noh gasdynamics problem to its ideal mag ... [Phys. Plasmas 19, 012707 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635947 Sat, 28 Jan 2012 01:37:39 +0100 5635947 Surpassing one x-ray photon per electron in nonlinear Thomson scattering in 180 degrees geometry http://www.medworm.com/index.php?rid=5635946&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013111%2F1%26agg%3Drss Shihua Zhao, Qingzheng Lv, Suying Yuan, and Yingjun Li We have obtained the general analytical expressions of harmonic radiation for Thomson scattering (TS) of arbitrary polarized laser by virtue of generalized Bessel functions and derived the extremum conditions for backscattered harmonics. Especially, for the fundamental backscattered Thomson scatteri ... [Phys. Plasmas 19, 013111 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635946 Sat, 28 Jan 2012 01:37:39 +0100 5635946 Two dimensional nonplanar evolution of electrostatic shock waves in pair-ion plasmas http://www.medworm.com/index.php?rid=5635945&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012119%2F1%26agg%3Drss W. Masood and H. Rizvi Electrostatic waves in a two dimensional nonplanar geometry are studied in an unmagnetized, dissipative pair-ion plasma in the presence of weak transverse perturbations. The dissipation in the system is taken into account by incorporating the kinematic viscosity of both positive and negative ions in ... [Phys. Plasmas 19, 012119 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635945 Sat, 28 Jan 2012 01:37:39 +0100 5635945 Coupled modes in magnetized dense plasma with relativistic-degenerate electrons http://www.medworm.com/index.php?rid=5635944&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014506%2F1%26agg%3Drss S. A. Khan Low frequency electrostatic and electromagnetic waves are investigated in ultra-dense quantum magnetoplasma with relativistic-degenerate electron and non-degenerate ion fluids. The dispersion relation is derived for mobile as well as immobile ions by employing hydrodynamic equations for such plasma ... [Phys. Plasmas 19, 014506 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635944 Sat, 28 Jan 2012 01:37:39 +0100 5635944 Numerical investigation of the ion temperature effect in magnetized plasma sheath with two species of positive ions http://www.medworm.com/index.php?rid=5635943&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012120%2F1%26agg%3Drss A. K. Shaw, S. Kar, K. S. Goswami, and B. J. Saikia The effect of ion temperature, magnitude of magnetic field and its orientation on a magnetized plasma sheath consisting of electrons and two species of positive ions are investigated. Using three-fluid hydrodynamic model and some dimensionless variables, the dimensionless equations are obtained and ... [Phys. Plasmas 19, 012120 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635943 Sat, 28 Jan 2012 01:37:39 +0100 5635943 Observation of electron plasma waves inside large amplitude electromagnetic pulses in a temporally growing plasma http://www.medworm.com/index.php?rid=5635942&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012118%2F1%26agg%3Drss Shail Pandey, Sudeep Bhattacharjee, and Debaprasad Sahu Observation of electron plasma waves excited inside high power (~10 kW) short pulse (~20 [mu]s) electromagnetic (em) waves interacting with a gaseous medium (argon) in the pressure range 0.22.5 mTorr is reported. The waves have long wavelength (~13 cm) and get damped at time scales slower (~3 [mu]s) ... [Phys. Plasmas 19, 012118 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635942 Sat, 28 Jan 2012 01:37:39 +0100 5635942 Three-dimensional model and simulation of vacuum arcs under axial magnetic fields http://www.medworm.com/index.php?rid=5635941&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013507%2F1%26agg%3Drss Lijun Wang, Shenli Jia, Xin Zhou, Haijing Wang, and Zongqian Shi In this paper, a three-dimensional (3d) magneto-hydro-dynamic (MHD) model of axial magnetic field vacuum arcs (AMFVAs) is established. Based on this model, AMFVAs are simulated and analyzed. Three-dimensional spatial distributions of many important plasma parameters and electric characteristics in A ... [Phys. Plasmas 19, 013507 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635941 Sat, 28 Jan 2012 01:37:39 +0100 5635941 Novel electromagnetic radiation in a semi-infinite space filled with a double-negative metamaterial http://www.medworm.com/index.php?rid=5635940&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013112%2F1%26agg%3Drss Zhaoyun Duan, Chen Guo, Jun Zhou, Jucheng Lu, and Min Chen We have theoretically investigated the electromagnetic radiation excited by a charged particle moving along a semi-infinite space filled with a double-negative metamaterial (DNM). Cherenkov radiation in the double-negative region exhibits reversed or backward radiation behavior. The spectral density ... [Phys. Plasmas 19, 013112 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635940 Sat, 28 Jan 2012 01:37:39 +0100 5635940 Turbulent transport of toroidal angular momentum in fusion plasmas http://www.medworm.com/index.php?rid=5635939&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012314%2F1%26agg%3Drss I. Holod, Z. Lin, and Y. Xiao Global nonlinear gyrokinetic simulations of ion temperature gradient (ITG) and collisionless trapped electron mode (CTEM) turbulence find significant spinning up of a plasma in the directions opposite for CTEM and ITG turbulence. The outward momentum convection by the particle flux could be strong e ... [Phys. Plasmas 19, 012314 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635939 Sat, 28 Jan 2012 01:37:39 +0100 5635939 A watt-class 1-THz backward-wave oscillator based on sine waveguide http://www.medworm.com/index.php?rid=5635938&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013113%2F1%26agg%3Drss Xiong Xu, Yanyu Wei, Fei Shen, Hairong Yin, Jin Xu et al. A novel backward wave oscillator was proposed by utilizing a concise sine waveguide slow-wave structure combined with sheet electron beam to operate at terahertz frequency band. First, the design method was described, and the dispersion curve and interaction impedance of the sine waveguide were calc ... [Phys. Plasmas 19, 013113 (2012)] published Thu Jan 26, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635938 Sat, 28 Jan 2012 01:37:39 +0100 5635938 Defect modes in one-dimensional magnetized plasma photonic crystals with a dielectric defect layer http://www.medworm.com/index.php?rid=5635937&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012509%2F1%26agg%3Drss L. Qi, Z. Yang, and T. Fu By using transfer matrix method, properties of one-dimensional magnetized plasma photonic crystals with a dielectric defect layer are studied. Results show that several defect modes appear within the photonic band gaps; periodic number and collision frequency only affect transmission magnitude of th ... [Phys. Plasmas 19, 012509 (2012)] published Fri Jan 27, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635937 Sat, 28 Jan 2012 01:37:39 +0100 5635937 The quench rule, Dimits shift, and eigenmode localization by small-scale zonal flows http://www.medworm.com/index.php?rid=5635936&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012315%2F1%26agg%3Drss Sumire Kobayashi and Barrett N. Rogers We perform gyrokinetic simulations in a simple Z-pinch geometry to study the physics of small scale, entropy-mode-driven zonal flows. The entropy-modes create radial E x B streamers, which become unstable to the Kelvin-Helmholz (KH) instability at the point of nonlinear saturation. Sufficiently clos ... [Phys. Plasmas 19, 012315 (2012)] published Fri Jan 27, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635936 Sat, 28 Jan 2012 01:37:39 +0100 5635936 Tracking shocked dust: State estimation for a complex plasma during a shock wave http://www.medworm.com/index.php?rid=5635935&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013708%2F1%26agg%3Drss Neil P. Oxtoby, Jason F. Ralph, Celine Durniak, and Dmitry Samsonov We consider a two-dimensional complex (dusty) plasma crystal excited by an electrostatically-induced shock wave. Dust particle kinematics in such a system are usually determined using particle tracking velocimetry. In this work we present a particle tracking algorithm which determines the dust parti ... [Phys. Plasmas 19, 013708 (2012)] published Fri Jan 27, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5635935 Sat, 28 Jan 2012 01:37:39 +0100 5635935 Particle beam self-modulation instability in tapered and inhomogeneous plasma http://www.medworm.com/index.php?rid=5625194&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F010703%2F1%26agg%3Drss C. B. Schroeder, C. Benedetti, E. Esarey, F. J. Gruner, and W. P. Leemans The particle beam self-modulation instability in tapered and inhomogeneous plasmas is analyzed via an evolution equation for the beam radius. For a sufficiently fast taper, the instability is suppressed, and the condition for growth suppression is derived. The form of the taper to phase lock a trail ... [Phys. Plasmas 19, 010703 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625194 Wed, 25 Jan 2012 02:29:08 +0100 5625194 The effect of q-distributed electrons on the head-on collision of ion acoustic solitary waves http://www.medworm.com/index.php?rid=5625193&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012113%2F1%26agg%3Drss Uday Narayan Ghosh, Prasanta Chatterjee, and Rajkumar Roychoudhury The head-on collision of ion acoustic solitary waves (IASWs) in two component plasma comprising nonextensive distributed electrons is investigated. Two opposite directional Kortewg-de-vries (KdV) equations are derived and the phase shift due to collision is obtained using the extended version of Poi ... [Phys. Plasmas 19, 012113 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625193 Wed, 25 Jan 2012 02:29:08 +0100 5625193 Effect of dust charging and trapped electrons on nonlinear solitary structures in an inhomogeneous magnetized plasma http://www.medworm.com/index.php?rid=5625192&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012114%2F1%26agg%3Drss Ravinder Kumar, Hitendra K. Malik, and Khushvant Singh Main concerns of the present article are to investigate the effects of dust charging and trapped electrons on the solitary structures evolved in an inhomogeneous magnetized plasma. Such a plasma is found to support two types of waves, namely, fast wave and slow wave. Slow wave propagates in the plas ... [Phys. Plasmas 19, 012114 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625192 Wed, 25 Jan 2012 02:29:08 +0100 5625192 Collisionless distribution function for the relativistic force-free Harris sheet http://www.medworm.com/index.php?rid=5625191&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012115%2F1%26agg%3Drss C. R. Stark and T. Neukirch A self-consistent collisionless distribution function for the relativistic analogue of the force-free Harris sheet is presented. This distribution function is the relativistic generalization of the distribution function for the non-relativistic collisionless force-free Harris sheet recently found by ... [Phys. Plasmas 19, 012115 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625191 Wed, 25 Jan 2012 02:29:08 +0100 5625191 Sheared-flow induced confinement transition in a linear magnetized plasma http://www.medworm.com/index.php?rid=5625190&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012116%2F1%26agg%3Drss S. Zhou, W. W. Heidbrink, H. Boehmer, R. McWilliams, T. A. Carter et al. A magnetized plasma cylinder (12 cm in diameter) is induced by an annular shape obstacle at the Large Plasma Device [W. Gekelman, H. Pfister, Z. Lucky, J. Bamber, D. Leneman, and J. Maggs, Rev. Sci. Instrum. 62, 2875 (1991)]. Sheared azimuthal flow is driven at the edge of the plasma cylinder throug ... [Phys. Plasmas 19, 012116 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625190 Wed, 25 Jan 2012 02:29:08 +0100 5625190 Determination of the levitation limits of dust particles within the sheath in complex plasma experiments http://www.medworm.com/index.php?rid=5625189&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013707%2F1%26agg%3Drss Angela Douglass, Victor Land, Ke Qiao, Lorin Matthews, and Truell Hyde Experiments are performed in which dust particles are levitated at varying heights above the powered electrode in a radio frequency plasma discharge by changing the discharge power. The trajectories of particles dropped from the top of the discharge chamber are used to reconstruct the vertical elect ... [Phys. Plasmas 19, 013707 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625189 Wed, 25 Jan 2012 02:29:08 +0100 5625189 Dynamic procedure for filtered gyrokinetic simulations http://www.medworm.com/index.php?rid=5625188&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012311%2F1%26agg%3Drss P. Morel, A. Banon Navarro, M. Albrecht-Marc, D. Carati, F. Merz et al. Large eddy simulations (LES) of gyrokinetic plasma turbulence are investigated as interesting candidates to decrease the computational cost. A dynamic procedure is implemented in the gene code, allowing for dynamic optimization of the free parameters of the LES models (setting the amplitudes of diss ... [Phys. Plasmas 19, 012311 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625188 Wed, 25 Jan 2012 02:29:08 +0100 5625188 Evidence cross-validation and Bayesian inference of MAST plasma equilibria http://www.medworm.com/index.php?rid=5625187&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012506%2F1%26agg%3Drss G. T. von Nessi, M. J. Hole, J. Svensson, and L. Appel In this paper, current profiles for plasma discharges on the mega-ampere spherical tokamak are directly calculated from pickup coil, flux loop, and motional-Stark effect observations via methods based in the statistical theory of Bayesian analysis. By representing toroidal plasma current as a series ... [Phys. Plasmas 19, 012506 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625187 Wed, 25 Jan 2012 02:29:08 +0100 5625187 The dispersion relation and excitation of transverse magnetic mode electromagnetic waves in rippled-wall waveguide with a plasma rod and an annular dielectric http://www.medworm.com/index.php?rid=5625186&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013109%2F1%26agg%3Drss M. Nejati and B. Shokri By using the linear field theory, the dispersion relation of electromagnetic waves in a rippled-wall waveguide with a plasma rod and an annular dielectric is obtained. In addition, by injecting a finite thick annular intense relativistic electron beam in this waveguide, the excitation of these waves ... [Phys. Plasmas 19, 013109 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625186 Wed, 25 Jan 2012 02:29:08 +0100 5625186 Longitudinal singular response of dusty plasma medium in weak and strong coupling limits http://www.medworm.com/index.php?rid=5625185&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013706%2F1%26agg%3Drss Sanat Kumar Tiwari, Amita Das, Predhiman Kaw, and Abhijit Sen The longitudinal response of a dusty plasma medium in both weak and strong coupling limits has been investigated in detail using analytic as well as numerical techniques. In particular, studies on singular response of the medium have been specifically investigated here. A proper Galilean invariant f ... [Phys. Plasmas 19, 013706 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625185 Wed, 25 Jan 2012 02:29:08 +0100 5625185 The effect of elementary reactions on solitary waves in dusty plasmas http://www.medworm.com/index.php?rid=5625184&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014503%2F1%26agg%3Drss A. Tahraoui and R. Annou The conditions of existence of solitons have been determined by Wang et al. [Phys. Lett. A 339, 96 (2005)], in negative ions containing dusty plasmas where Boltzmannian ions and electrons are assumed. The study is revisited taking into account actual elementary reactions in plasma conditions, viz., ... [Phys. Plasmas 19, 014503 (2012)] published Mon Jan 23, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625184 Wed, 25 Jan 2012 02:29:08 +0100 5625184 Comparisons between nonlinear kinetic modelings of simulated Raman scattering using envelope equations http://www.medworm.com/index.php?rid=5625183&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013110%2F1%26agg%3Drss Didier Benisti, Nikolai A. Yampolsky, and Nathaniel J. Fisch In this paper, we compare two recent models [N. A. Yampolsky and N. J. Fisch, Phys. Plasmas 16, 072104 (2009); D. Benisti, D. J. Strozzi, L. Gremillet, and O. Morice, Phys. Rev. Lett. 103, 155002 (2009)] introduced to predict the nonlinear growth of stimulated Raman scattering in the kinetic regime, ... [Phys. Plasmas 19, 013110 (2012)] published Tue Jan 24, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625183 Wed, 25 Jan 2012 02:29:08 +0100 5625183 Experimental investigation of the stimulated Brillouin scattering growth and saturation at 526 and 351 nm for direct drive and shock ignition http://www.medworm.com/index.php?rid=5625182&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012705%2F1%26agg%3Drss S. Depierreux, P. Loiseau, D. T. Michel, V. Tassin, C. Stenz et al. We have designed experiments to study the effect of the laser wavelength (0.527 versus 0.351 [mu]m) on the coupling efficiency in plasma conditions relevant to compression and shock ignition (SI) schemes in different intensity regimes. A difficult issue was to produce interaction conditions that are ... [Phys. Plasmas 19, 012705 (2012)] published Tue Jan 24, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625182 Wed, 25 Jan 2012 02:29:08 +0100 5625182 Propagation of nonlinear coherent structures in a collisional magnetoplasma with nonthermal electrons and finite ion temperature http://www.medworm.com/index.php?rid=5625181&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012117%2F1%26agg%3Drss W. Masood, H. Rizvi, and N. Imtiaz Nonlinear electrostatic waves in dissipative magnetized electron-ion (e-i) plasmas are investigated employing the two fluid model. In this regard, Zakharov Kuznetsov Burgers (ZKB) equation is derived using the small amplitude perturbation expansion method. It is observed that the nonthermal electron ... [Phys. Plasmas 19, 012117 (2012)] published Tue Jan 24, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5625181 Wed, 25 Jan 2012 02:29:08 +0100 5625181 A comprehensive study of different gases in inductively coupled plasma torch operating at one atmosphere http://www.medworm.com/index.php?rid=5617461&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012108%2F1%26agg%3Drss Sangeeta B. Punjabi, N. K. Joshi, H. A. Mangalvedekar, B. K. Lande, A. K. Das et al. A numerical study is done to understand the possible operating regimes of RF-ICP torch (3 MHz, 50 kW) using different gases for plasma formation at atmospheric pressure. A two dimensional numerical simulation of RF-ICP torch using argon, nitrogen, oxygen, and air as plasma gas has been investigated ... [Phys. Plasmas 19, 012108 (2012)] published Thu Jan 19, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617461 Sun, 22 Jan 2012 01:22:16 +0100 5617461 Tokamak L/H mode transition http://www.medworm.com/index.php?rid=5617460&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012505%2F1%26agg%3Drss K. H. Tsui and C. E. Navia Through the non field-aligned rotational tokamak equilibrium of a divergence-free plasma flow with a pair of transformed plasma variables w-vector=([mu]rho) nu-vector and [mu]p=([mu]p+w/2) [K. H. Tsui, Phys. Plasmas 18, 072502 (2011)], a preliminary understanding of the L/H equilibrium transition is ... [Phys. Plasmas 19, 012505 (2012)] published Thu Jan 19, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617460 Sun, 22 Jan 2012 01:22:16 +0100 5617460 Spatial redistribution of turbulent and mean kinetic energy http://www.medworm.com/index.php?rid=5617459&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012309%2F1%26agg%3Drss P. Manz, M. Xu, N. Fedorczak, S. C. Thakur, and G. R. Tynan The turbulent spatial redistribution of turbulent and mean kinetic energy and its exchange is investigated in the framework of an K-epsilon model in a magnetized plasma column. The kinetic energy is transferred from the turbulence into the zonal flow around the shear layer. The Reynolds stress profi ... [Phys. Plasmas 19, 012309 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617459 Sun, 22 Jan 2012 01:22:16 +0100 5617459 Pitch angle scattering of relativistic electrons from stationary magnetic waves: Continuous Markov process and quasilinear theory http://www.medworm.com/index.php?rid=5617458&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012306%2F1%26agg%3Drss Don S. Lemons We develop a Markov process theory of charged particle scattering from stationary, transverse, magnetic waves. We examine approximations that lead to quasilinear theory, in particular the resonant diffusion approximation. We find that, when appropriate, the resonant diffusion approximation simplifie ... [Phys. Plasmas 19, 012306 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617458 Sun, 22 Jan 2012 01:22:16 +0100 5617458 Turbulence driven particle transport in Texas Helimak http://www.medworm.com/index.php?rid=5617457&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012307%2F1%26agg%3Drss D. L. Toufen, Z. O. Guimaraes-Filho, I. L. Caldas, F. A. Marcus, and K. W. Gentle We analyze the turbulence driven particle transport in Texas Helimak [K. W. Gentle and H. He, Plasma Sci. Technol. 10, 284 (2008)], a toroidal plasma device with a one-dimensional equilibrium with magnetic curvature and shear. Alterations on the radial electric field, through an external voltage bia ... [Phys. Plasmas 19, 012307 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617457 Sun, 22 Jan 2012 01:22:16 +0100 5617457 Stimulated Raman scattering coupled to decay instability in a plasma channel http://www.medworm.com/index.php?rid=5617456&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012109%2F1%26agg%3Drss Ranjeet Singh and V. K. Tripathi A non local theory of Stimulated Raman scattering (SRS) coupled to decay instability in a plasma channel is developed. The primary Langmuir wave, produced in the Raman backscattering process, decays into a secondary Langmuir wave of longer wavelength and an ion acoustic wave. This diversion of energ ... [Phys. Plasmas 19, 012109 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617456 Sun, 22 Jan 2012 01:22:16 +0100 5617456 Minimum energy states of the cylindrical plasma pinch in single-fluid and Hall magnetohydrodynamics http://www.medworm.com/index.php?rid=5617455&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012111%2F1%26agg%3Drss I. V. Khalzov, F. Ebrahimi, D. D. Schnack, and V. V. Mirnov Relaxed states of a plasma column are found analytically in single-fluid and Hall magnetohydrodynamics (MHD). We perform complete minimization of the energy with constraints imposed by invariants inherent in the corresponding models. It is shown that the relaxed state in Hall MHD is a force-free mag ... [Phys. Plasmas 19, 012111 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617455 Sun, 22 Jan 2012 01:22:16 +0100 5617455 Electrostatic shock dynamics in superthermal plasmas http://www.medworm.com/index.php?rid=5617454&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012310%2F1%26agg%3Drss S. Sultana, G. Sarri, and I. Kourakis The propagation of ion acoustic shocks in nonthermal plasmas is investigated, both analytically and numerically. An unmagnetized collisionless electron-ion plasma is considered, featuring a superthermal (non-Maxwellian) electron distribution, which is modeled by a kappa-(kappa) distribution function ... [Phys. Plasmas 19, 012310 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617454 Sun, 22 Jan 2012 01:22:16 +0100 5617454 Landau damping of a driven plasma wave from laser pulses http://www.medworm.com/index.php?rid=5617453&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012112%2F1%26agg%3Drss Zhigang Bu and Peiyong Ji The interaction between a laser pulse and a driven plasma wave with a phase velocity approaching the speed of light is studied, and our investigation is focused on the Gaussian laser pulse. It is demonstrated that when the resonance condition between the plasma wave and the laser pulse is satisfied, ... [Phys. Plasmas 19, 012112 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617453 Sun, 22 Jan 2012 01:22:16 +0100 5617453 Effect of guide field on lower-hybrid drift instabilities in current sheet containing energetic particles http://www.medworm.com/index.php?rid=5617452&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012110%2F1%26agg%3Drss Feng Huang, Yinhua Chen, Yibao Li, and M. Y. Yu The effect of a guide field on the linear lower-hybrid drift instability (LHDI) in a thin current sheet containing energetic particles is investigated using kinetic theory. It is found that the symmetry properties of the LHD modes are destroyed by the guide field. The LHDI growth rate decreases with ... [Phys. Plasmas 19, 012110 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617452 Sun, 22 Jan 2012 01:22:16 +0100 5617452 Modeling of asymmetric pulsed phenomena in dielectric-barrier atmospheric-pressure glow discharges http://www.medworm.com/index.php?rid=5617451&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012308%2F1%26agg%3Drss Yan Ha, Huijuan Wang, and Xiaofei Wang Asymmetric current pulses in dielectric-barrier atmospheric-pressure glow discharges are investigated by a self-consistent, one-dimensional fluid model. It is found that the glow mode and Townsend mode can coexist in the asymmetric discharge even though the gas gap is rather large. The reason for th ... [Phys. Plasmas 19, 012308 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617451 Sun, 22 Jan 2012 01:22:16 +0100 5617451 Evolution of metastable state molecules N(ASigma) in a nanosecond pulsed discharge: A particle-in-cell/Monte Carlo collisions simulation http://www.medworm.com/index.php?rid=5617450&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013505%2F1%26agg%3Drss Liang Gao, Jizhong Sun, Chunlei Feng, Jing Bai, and Hongbin Ding A particle-in-cell plus Monte Carlo collisions method has been employed to investigate the nitrogen discharge driven by a nanosecond pulse power source. To assess whether the production of the metastable state N(ASigma) can be efficiently enhanced in a nanosecond pulsed discharge, the evolutions of ... [Phys. Plasmas 19, 013505 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617450 Sun, 22 Jan 2012 01:22:16 +0100 5617450 Optical diagnosis and theoretical simulation of laser induced lead plasma spectrum http://www.medworm.com/index.php?rid=5617449&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013302%2F1%26agg%3Drss Hong Bo Fu, Chuan Song Chen, Bao Yuan Man, Xiao Song, and Dong Liu Plasmas generated during incipient laser ablation of lead in air were studied using emission spectroscopy and fast photography by an intensified charge coupled device (ICCD) camera. An improved plasma emission model was introduced, invoking one-dimensional radiative transfer, to describe the observe ... [Phys. Plasmas 19, 013302 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617449 Sun, 22 Jan 2012 01:22:16 +0100 5617449 Laser heating of finite two-dimensional dust clusters: A. Experiments http://www.medworm.com/index.php?rid=5617448&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013705%2F1%26agg%3Drss Jan Schablinski, Dietmar Block, Alexander Piel, Andre Melzer, Hauke Thomsen et al. Laser manipulation allows to control the kinetic particle temperature in dusty plasmas. Different methods of laser heating for plasma crystals are benchmarked experimentally. The methods are analyzed with respect to homogeneity and isotropy in a spatial, temporal, and statistical sense. It is shown ... [Phys. Plasmas 19, 013705 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617448 Sun, 22 Jan 2012 01:22:16 +0100 5617448 Efficiency enhancement in free-electron laser amplifier with one dimensional helical wiggler and ion-channel guiding http://www.medworm.com/index.php?rid=5617447&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013107%2F1%26agg%3Drss F. Jafari Bahman and B. Maraghechi A method for efficiency enhancement in free-electron laser is studied which uses both tapered wiggler magnetic field and ion-channel density. Derivation of a set of nonlinear and coupled differential equations leads to the self-consistent description of the evolution of both an ensemble of electrons ... [Phys. Plasmas 19, 013107 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617447 Sun, 22 Jan 2012 01:22:16 +0100 5617447 Bremsstrahlung of fast electrons in long air gaps http://www.medworm.com/index.php?rid=5617446&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013108%2F1%26agg%3Drss E. V. Oreshkin, S. A. Barengolts, S. A. Chaikovsky, A. V. Oginov, K. V. Shpakov et al. The results of an experiment on discharges in long atmospheric pressure air gaps at a pulsed voltage of amplitude up to 800 kV and risetime 150200 ns have been analyzed. In the experiment, a radiation pulse of photon energy >5 keV and duration 1020 ns was observed. In analyzing the experimental data ... [Phys. Plasmas 19, 013108 (2012)] published Fri Jan 20, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5617446 Sun, 22 Jan 2012 01:22:16 +0100 5617446 Symmetry breaking effects of density gradient on parallel momentum transport: A new rho effect http://www.medworm.com/index.php?rid=5604486&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012301%2F1%26agg%3Drss Rameswar Singh, R. Singh, P. Kaw, O. D. Gurcan, P. H. Diamond et al. Symmetry breaking effects of density gradient on parallel momentum transport is studied via quasilinear theory. It is shown that finite rho([equivalent]rho/L), where rho is ion sound radius and L is density scale length, leads to symmetry breaking of the ion temperature gradient (ITG) eigenfunction. ... [Phys. Plasmas 19, 012301 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604486 Thu, 19 Jan 2012 02:04:40 +0100 5604486 Fast-electron generation in long-scale-length plasmas http://www.medworm.com/index.php?rid=5604485&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012704%2F1%26agg%3Drss B. Yaakobi, P.-Y. Chang, A. Solodov, C. Stoeckl, D. H. Edgell et al. Long-scale-length (~400-[mu]m) planar CH plasmas have been generated on OMEGA EP with laser intensities of the order of 10 W/cm and ~1-mm focal spots to quantify the number and temperature of fast electrons caused by the two-plasmon-decay instability. The main diagnostics were the time-integrated K ... [Phys. Plasmas 19, 012704 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604485 Thu, 19 Jan 2012 02:04:40 +0100 5604485 Weakly dissipative dust-ion-acoustic solitons in complex plasmas and the effect of electromagnetic radiation http://www.medworm.com/index.php?rid=5604484&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013703%2F1%26agg%3Drss T. V. Losseva, S. I. Popel, A. P. Golub', Yu. N. Izvekova, and P. K. Shukla Possibility for dust ion-acoustic solitons to exist in complex (dusty) plasmas in the presence of electromagnetic radiation, which results in positive dust particle charges, is investigated. Dissipative processes occurring during the propagation of dust ion-acoustic perturbations, among which are th ... [Phys. Plasmas 19, 013703 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604484 Thu, 19 Jan 2012 02:04:40 +0100 5604484 Asymptotic equilibrium between Langmuir turbulence and suprathermal electrons in three dimensions http://www.medworm.com/index.php?rid=5604483&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012304%2F1%26agg%3Drss Peter H. Yoon The suprathermal electron distributions with non-Maxwellian tail are commonly detected in space environment as well as in the laboratory. In a previous article [P. H. Yoon, Phys. Plasmas 18, 122303 (2011)], a self-consistent theory of asymptotically steady-state electron distribution function and La ... [Phys. Plasmas 19, 012304 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604483 Thu, 19 Jan 2012 02:04:40 +0100 5604483 The quantum dusty magnetosonic solitary wave in magnetized plasma http://www.medworm.com/index.php?rid=5604482&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013704%2F1%26agg%3Drss Yunliang Wang, Zhongxiang Zhou, Hong Qiu, Fengping Wang, and Yanzhen Lu The effects of quantum statistic and quantum diffraction on the weakly two-dimensional fast quantum dusty magnetosonic wave propagating perpendicular to the external magnetic field are investigated by considering the inertialess electron, inertialess ion, and inertial cold dust in the low frequency ... [Phys. Plasmas 19, 013704 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604482 Thu, 19 Jan 2012 02:04:40 +0100 5604482 Femtosecond laser-plasma interaction with prepulse-generated liquid metal microjets http://www.medworm.com/index.php?rid=5604481&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013104%2F1%26agg%3Drss D. S. Uryupina, K. A. Ivanov, A. V. Brantov, A. B. Savel'ev, V. Yu. Bychenkov et al. Ultrashort laser pulse interaction with a microstructured surface of a melted metal is a promising source of hard x-ray radiation. Microstructuring is achieved by a weak prepulse that produces narrow high-density microjets. As an x-ray source, the interaction of the main laser pulse with such jets i ... [Phys. Plasmas 19, 013104 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604481 Thu, 19 Jan 2012 02:04:40 +0100 5604481 Dust acoustic solitary waves in a dusty plasma with two kinds of nonthermal ions at different temperatures http://www.medworm.com/index.php?rid=5604480&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013702%2F1%26agg%3Drss Davoud Dorranian and Akbar Sabetkar The nonlinear dust acoustic solitary waves in a dusty plasma with two nonthermal ion species at different temperatures is studied analytically. Using reductive perturbation method, the Kadomtsev-Petviashivili (KP) equation is derived, and the effects of nonthermal coefficient, ions temperature, and ... [Phys. Plasmas 19, 013702 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604480 Thu, 19 Jan 2012 02:04:40 +0100 5604480 Experimental demonstration of a compact high efficient relativistic magnetron with directly axial radiation http://www.medworm.com/index.php?rid=5604479&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013105%2F1%26agg%3Drss Wei Li, Yong-gui Liu, Ting Shu, Han-wu Yang, Yu-wei Fan et al. A compact relativistic magnetron with axial microwave radiation is experimentally investigated. Under the modified magnetic field distribution, only connecting a special horn antenna in the axial direction, the relativistic magnetron can stably radiate high power and high efficiency microwaves. The ... [Phys. Plasmas 19, 013105 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604479 Thu, 19 Jan 2012 02:04:40 +0100 5604479 Topology of tokamak plasma equilibria with toroidal current reversal http://www.medworm.com/index.php?rid=5604478&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012504%2F1%26agg%3Drss Paulo Rodrigues and Joao P. S. Bizarro Some general principles about scalar functions with critical points are used to rigorously ascertain that magnetic equilibria with both toroidal current reversal and nested magnetic surfaces are atypical solutions and highly unstable to arbitrary perturbations of boundary conditions and other parame ... [Phys. Plasmas 19, 012504 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604478 Thu, 19 Jan 2012 02:04:40 +0100 5604478 Optical and magneto-optical properties of one-dimensional magnetized coupled resonator plasma photonic crystals http://www.medworm.com/index.php?rid=5604477&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012503%2F1%26agg%3Drss S. M. Hamidi In this paper, the optical and magneto-optical properties of one-dimensional magnetized coupled resonator plasma photonic crystals have been investigated. We use transfer matrix method to solve our magnetized coupled resonator plasma photonic crystals consist of dielectric and magnetized plasma laye ... [Phys. Plasmas 19, 012503 (2012)] published Tue Jan 17, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604477 Thu, 19 Jan 2012 02:04:40 +0100 5604477 Measuring of plasma properties indu[cyrillic es]ed by non-vacuum electron beam welding http://www.medworm.com/index.php?rid=5604476&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013106%2F1%26agg%3Drss U. Reisgen, M. Schleser, A. Abdurakhmanov, and A. Gumenyuk Electron beam plasma measurement was realised by means of DIABEAM system invented by ISF RWTH Aachen. The Langmuir probe method is used for measurement. The relative simplicity of the method and the possibility of dispersion of high power on the probe allow its application for the investigation of h ... [Phys. Plasmas 19, 013106 (2012)] published Wed Jan 18, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604476 Thu, 19 Jan 2012 02:04:40 +0100 5604476 Comparison of entropy production rates in two different types of self-organized flows: Benard convection and zonal flow http://www.medworm.com/index.php?rid=5604475&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012305%2F1%26agg%3Drss Y. Kawazura and Z. Yoshida Two different types of self-organizing and sustaining ordered motion in fluids or plasmasone is a Benard convection (or streamer) and the other is a zonal flowhave been compared by introducing a thermodynamic phenomenological model and evaluating the corresponding entropy production rates (EP). Thes ... [Phys. Plasmas 19, 012305 (2012)] published Wed Jan 18, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604475 Thu, 19 Jan 2012 02:04:40 +0100 5604475 Self-heating in kinematically complex magnetohydrodynamic flows http://www.medworm.com/index.php?rid=5604474&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012901%2F1%26agg%3Drss Zaza Osmanov, Andria Rogava, and Stefaan Poedts The non-modal self-heating mechanism driven by the velocity shear in kinematically complex magnetohydrodynamic (MHD) plasma flows is considered. The study is based on the full set of MHD equations including dissipative terms. The equations are linearized and unstable modes in the flow are looked for ... [Phys. Plasmas 19, 012901 (2012)] published Wed Jan 18, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604474 Thu, 19 Jan 2012 02:04:40 +0100 5604474 Influence of plasma loss area on transport of charged particles through a transverse magnetic field http://www.medworm.com/index.php?rid=5604473&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013504%2F1%26agg%3Drss B. K. Das, M. Bandyopadhyay, and M. Chakraborty Plasma transport in a double plasma device from the source region to the target region through a physical window comprising of electrically grounded magnet channels (filled with permanent magnet bars) for transverse magnetic field (TMF) and a pair of stainless steel (SS) plates is studied and presen ... [Phys. Plasmas 19, 013504 (2012)] published Wed Jan 18, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5604473 Thu, 19 Jan 2012 02:04:40 +0100 5604473 Strong Langmuir turbulence in Kappa distributed plasmas http://www.medworm.com/index.php?rid=5593910&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012303%2F1%26agg%3Drss San-Qiu Liu and Hui Chen Superthermal electrons are often observed in space and astrophysics and can be appropriate modeled by the family of Kappa distribution functions. Taking the nonlinear wave-wave, wave-particle interactions and the effect of superthermal electrons into account, the strong Langmuir turbulence is invest ... [Phys. Plasmas 19, 012303 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593910 Mon, 16 Jan 2012 03:36:14 +0100 5593910 Relation of astrophysical turbulence and magnetic reconnection http://www.medworm.com/index.php?rid=5593909&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012105%2F1%26agg%3Drss A. Lazarian, Gregory L. Eyink, and E. T. Vishniac Astrophysical fluids are generically turbulent and this must be taken into account for most transport processes. We discuss how the preexisting turbulence modifies magnetic reconnection and how magnetic reconnection affects the MHD turbulent cascade. We show the intrinsic interdependence and interre ... [Phys. Plasmas 19, 012105 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593909 Mon, 16 Jan 2012 03:36:14 +0100 5593909 A Maxwell formulation for the equations of a plasma http://www.medworm.com/index.php?rid=5593908&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F010702%2F1%26agg%3Drss Richard J. Thompson and Trevor M. Moeller In light of the analogy between the structure of electrodynamics and fluid dynamics, the fluid equations of motion may be reformulated as a set of Maxwell equations. This analogy has been explored in the literature for incompressible turbulent flow and compressible flow but has not been widely explo ... [Phys. Plasmas 19, 010702 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593908 Mon, 16 Jan 2012 03:36:14 +0100 5593908 Modelling of the internal dynamics and density in a tens of joules plasma focus device http://www.medworm.com/index.php?rid=5593907&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012703%2F1%26agg%3Drss Ariel Marquez, Jose Gonzalez, Ariel Tarifeno-Saldivia, Cristian Pavez, Leopoldo Soto et al. Using MHD theory, coupled differential equations were generated using a lumped parameter model to describe the internal behaviour of the pinch compression phase in plasma focus discharges. In order to provide these equations with appropriate initial conditions, the modelling of previous phases was i ... [Phys. Plasmas 19, 012703 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593907 Mon, 16 Jan 2012 03:36:14 +0100 5593907 An initial assessment of three-dimensional polar direct drive capsule asymmetries for implosions at the National Ignition Facility http://www.medworm.com/index.php?rid=5593906&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012702%2F1%26agg%3Drss Natalia S. Krasheninnikova, Sean M. Finnegan, and Mark J. Schmitt The National Ignition Facility (NIF) provides a unique opportunity to study implosion physics with nuclear yield. The use of polar direct drive (PDD) [A. M. Cok, R. S. Craxton, and P. W. McKenty, Phys. Plasmas 15, 082705 (2008)] provides a simple platform for the experimental studies without expensi ... [Phys. Plasmas 19, 012702 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593906 Mon, 16 Jan 2012 03:36:14 +0100 5593906 Interpretation of the I-Regime and transport associated with relevant heavy particle modes http://www.medworm.com/index.php?rid=5593905&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012302%2F1%26agg%3Drss B. Coppi and T. Zhou The excitation of a novel kind of heavy particle [B. Coppi et al., Phys. Rev. Lett. 17, 377 (1966); B. Coppi and T. Zhou, MIT(LNS) Report HEP 09/04, 2009, Cambridge, MA [Phys. Lett. A 375, 2916 (2011)]] mode at the edge of the plasma column is considered as the signature of the I-confinement Regime ... [Phys. Plasmas 19, 012302 (2012)] published Wed Jan 11, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593905 Mon, 16 Jan 2012 03:36:14 +0100 5593905 The effect of dust size distribution and dust charge fluctuation on dust acoustic solitary waves in a magnetized dusty plasma http://www.medworm.com/index.php?rid=5593904&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013701%2F1%26agg%3Drss Sarit Maitra Dust acoustic solitary waves in a magnetized dusty plasma are studied taking into account the effect of dust size and dust charge variations. Using the analytical and numerical results the influence of different plasma parameters on dust acoustic solitary waves are examined. It is observed that the ... [Phys. Plasmas 19, 013701 (2012)] published Thu Jan 12, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593904 Mon, 16 Jan 2012 03:36:14 +0100 5593904 Cross-field electron transport induced by a rotating spoke in a cylindrical Hall thruster http://www.medworm.com/index.php?rid=5593903&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013503%2F1%26agg%3Drss C. L. Ellison, Y. Raitses, and N. J. Fisch Rotating spoke phenomena have been observed in a variety of Hall thruster and other E x B devices. It has been suggested that the spoke may be associated with the enhancement of the electron cross-field transport. In this paper, the current conducted across the magnetic field via a rotating spoke ... [Phys. Plasmas 19, 013503 (2012)] published Thu Jan 12, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593903 Mon, 16 Jan 2012 03:36:14 +0100 5593903 Ion acoustic solitons in a plasma with two-temperature kappa-distributed electrons http://www.medworm.com/index.php?rid=5593902&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012106%2F1%26agg%3Drss T. K. Baluku and M. A. Hellberg Existence domains and characteristics of ion acoustic solitons are studied in a two-temperature electron plasma with both electron components being kappa-distributed, as found in Saturn's magnetosphere. As is the case for double-Boltzmann electrons, solitons of both polarities can exist over restric ... [Phys. Plasmas 19, 012106 (2012)] published Thu Jan 12, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593902 Mon, 16 Jan 2012 03:36:14 +0100 5593902 Effect of ionization distribution on the low frequency oscillations mode in Hall thrusters http://www.medworm.com/index.php?rid=5593901&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012107%2F1%26agg%3Drss Wei Liqiu, Wang Chunsheng, Han Ke, and Yu Daren It is found that the discharge parameters have notable effects on the mode of discharge current low frequency oscillation in Hall thrusters, but different discharge parameters might form the similar low frequency oscillation mode. In order to study the mechanism of oscillation mode formation, the io ... [Phys. Plasmas 19, 012107 (2012)] published Thu Jan 12, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5593901 Mon, 16 Jan 2012 03:36:14 +0100 5593901 Time evolution of filamentation and self-generated fields in the coronae of directly driven inertial-confinement fusion capsules http://www.medworm.com/index.php?rid=5577088&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012701%2F1%26agg%3Drss F. H. Seguin, C. K. Li, M. J.-E. Manuel, H. G. Rinderknecht, N. Sinenian et al. Time-gated radiography with monoenergetic 15-MeV protons, 3-MeV protons, and 4-MeV alpha particles has revealed a rich and complex evolution of electromagnetic field structures in and around imploding, directly driven inertial-confinement fusion (ICF) targets at the OMEGA laser facility. Plastic-she ... [Phys. Plasmas 19, 012701 (2012)] published Mon Jan 9, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5577088 Tue, 10 Jan 2012 08:21:56 +0100 5577088 Active control of the resistive wall mode with power saturation http://www.medworm.com/index.php?rid=5577087&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012502%2F1%26agg%3Drss Li Li, Yue Liu, and Yueqiang Liu An analytic model of non-linear feedback stabilization of the resistive wall mode is presented. The non-linearity comes from either the current or the voltage saturation of the control coil power supply. For the so-called flux-to-current control, the current saturation of active coils always results ... [Phys. Plasmas 19, 012502 (2012)] published Mon Jan 9, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5577087 Tue, 10 Jan 2012 08:21:56 +0100 5577087 Characterization of stable brush-shaped large-volume plasma generated at ambient air http://www.medworm.com/index.php?rid=5569583&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013501%2F1%26agg%3Drss Jie Tang, Wenqing Cao, Wei Zhao, Yishan Wang, and Yixiang Duan A brush-shaped, large-volume plasma was generated at ambient pressure with a dc power supply and flowing argon gas, as well as a narrow outlet slit. Based on the VI curve and emission profiles obtained in our experiment, the plasma shows some typical glow discharge characteristics. The electron dens ... [Phys. Plasmas 19, 013501 (2012)] published Wed Jan 4, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569583 Sat, 07 Jan 2012 07:48:42 +0100 5569583 Resonant third-harmonic generation of a short-pulse laser from electron-hole plasmas http://www.medworm.com/index.php?rid=5569582&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013101%2F1%26agg%3Drss Niti Kant, Devki Nandan Gupta, and Hyyong Suk In semiconductors, free carriers are created in pairs in inter-band transitions and consist of an electron and its corresponding hole. At very high carrier densities, carrier-carrier collisions dominate over carrier-lattice collisions and carriers begin to behave collectively to form plasma. Here, w ... [Phys. Plasmas 19, 013101 (2012)] published Thu Jan 5, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569582 Sat, 07 Jan 2012 07:48:42 +0100 5569582 Radiation pressure acceleration of corrugated thin foils by Gaussian and super-Gaussian beams http://www.medworm.com/index.php?rid=5569581&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013102%2F1%26agg%3Drss K. Adusumilli, D. Goyal, and V. K. Tripathi Rayleigh-Taylor instability of radiation pressure accelerated ultrathin foils by laser having Gaussian and super-Gaussian intensity distribution is investigated using a single fluid code. The foil is allowed to have ring shaped surface ripples. The radiation pressure force on such a foil is non-unif ... [Phys. Plasmas 19, 013102 (2012)] published Thu Jan 5, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569581 Sat, 07 Jan 2012 07:48:42 +0100 5569581 Observation of the Taylor instability in a dusty plasma http://www.medworm.com/index.php?rid=5569580&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014501%2F1%26agg%3Drss K. A. Pacha, J. R. Heinrich, S.-H. Kim, and R. L. Merlino Observations of the Taylor instability in a laboratory dusty plasma are presented. The dust cloud, formed in a dc argon glow-discharge plasma, is stratified into regions of high and low dust densities. The instability was triggered by a spontaneous intrusion of the low density dust fluid into the hi ... [Phys. Plasmas 19, 014501 (2012)] published Thu Jan 5, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569580 Sat, 07 Jan 2012 07:48:42 +0100 5569580 Poynting vector, energy densities, and pressure of collective transverse electromagnetic fluctuations in unmagnetized plasmas http://www.medworm.com/index.php?rid=5569579&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012101%2F1%26agg%3Drss R. Schlickeiser A systematic calculation of the electromagnetic properties (Poynting vector, electromagnetic energy, and pressure) of the collective transverse fluctuations in unmagnetized plasmas with velocity-anisotropic plasma particle distributions functions is presented. Time-averaged electromagnetic propertie ... [Phys. Plasmas 19, 012101 (2012)] published Thu Jan 5, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569579 Sat, 07 Jan 2012 07:48:42 +0100 5569579 Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip http://www.medworm.com/index.php?rid=5569578&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013502%2F1%26agg%3Drss Aarti Tewari, Ritu Walia, and Suresh C. Sharma The role of negatively charged ions in plasma on growth (without catalyst) and field emission properties of spherical carbon nanotube (CNT) tip has been theoretically investigated. A theoretical model of charge neutrality, including the kinetics of electrons, negatively and positively charged ions, ... [Phys. Plasmas 19, 013502 (2012)] published Thu Jan 5, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569578 Sat, 07 Jan 2012 07:48:42 +0100 5569578 Nonthermal effects on the electron-atom bremsstrahlung process in generalized Lorentzian plasmas http://www.medworm.com/index.php?rid=5569577&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013301%2F1%26agg%3Drss Young-Dae Jung and Woo-Pyo Hong The nonthermal effects on the electron-atom bremsstrahlung process are investigated in generalized Lorentzian plasmas. The screened atomic wave function and energy for the hydrogen atom in Lorentzian plasmas are obtained by the Ritz variational method. The electron-atom bremsstrahlung radiation cros ... [Phys. Plasmas 19, 013301 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569577 Sat, 07 Jan 2012 07:48:42 +0100 5569577 Chorus wave amplification: A free electron laser in the Earth's magnetosphere http://www.medworm.com/index.php?rid=5569576&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F010701%2F1%26agg%3Drss A. R. Soto-Chavez, A. Bhattacharjee, and C. S. Ng A new theoretical model for whistler-mode chorus amplification in the Earth's magnetosphere is presented. We derive, based on the free-electron laser mechanism in a high-gain amplifier, a new closed set of self-consistent relativistic equations that couple the Hamiltonian equations for particles wit ... [Phys. Plasmas 19, 010701 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569576 Sat, 07 Jan 2012 07:48:42 +0100 5569576 Quantum dynamic screening effects on the elastic collisions in strongly coupled semiclassical plasmas http://www.medworm.com/index.php?rid=5569575&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F014502%2F1%26agg%3Drss Chang-Geun Kim and Young-Dae Jung The quantum dynamic screening effects on the elastic electron-ion collisions are investigated in strongly coupled semiclassical plasmas. The second-order eikonal analysis with the impact parameter method is applied to obtain the eikonal phase shift and eikonal cross section as functions of the impac ... [Phys. Plasmas 19, 014502 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569575 Sat, 07 Jan 2012 07:48:42 +0100 5569575 Hybrid time dependent/independent solution for the He I line ratio temperature and density diagnostic for a thermal helium beam with applications in the scrape-off layer-edge regions in tokamaks http://www.medworm.com/index.php?rid=5569574&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012501%2F1%26agg%3Drss J. M. Munoz Burgos, O. Schmitz, S. D. Loch, and C. P. Ballance Spectroscopic studies of line emission intensities and ratios offer an attractive option in the development of non-invasive plasma diagnostics. Evaluating ratios of selected He I line emission profiles from the singlet and triplet neutral helium spin systems allows for simultaneous measurement of el ... [Phys. Plasmas 19, 012501 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569574 Sat, 07 Jan 2012 07:48:42 +0100 5569574 Micro focusing of fast electrons with opened cone targets http://www.medworm.com/index.php?rid=5569573&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F013103%2F1%26agg%3Drss Feng Liu (刘峰), Xiaoxuan Liu (林晓宣), Bicheng Liu (刘必成), Wenjun Ding (丁文君), Fei Du (杜飞) et al. Using opened reentrant cone silicon targets, we have demonstrated the effect of micro focusing of fast electrons generated in intense laser-plasma interactions. When an intense femtosecond laser pulse is focused tightly onto one of the side walls of the cone, fast electron beam emitted along the sid ... [Phys. Plasmas 19, 013103 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569573 Sat, 07 Jan 2012 07:48:42 +0100 5569573 Symmetry breaking effects of density gradient on parallel momentum transport: A new [eh] effect http://www.medworm.com/index.php?rid=5569572&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012301%2F1%26agg%3Drss Rameswar Singh, R. Singh, P. Kaw, O. D. Gurcan, P. H. Diamond et al. Symmetry breaking effects of density gradient on parallel momentum transport is studied via quasilinear theory. It is shown that finite rho([equivalent]rho/L), where rho is ion sound radius and L is density scale length, leads to symmetry breaking of the ion temperature gradient (ITG) eigenfunction. ... [Phys. Plasmas 19, 012301 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569572 Sat, 07 Jan 2012 07:48:42 +0100 5569572 Adiabatic nonlinear waves with trapped particles. I. General formalism http://www.medworm.com/index.php?rid=5569571&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012102%2F1%26agg%3Drss I. Y. Dodin and N. J. Fisch A Lagrangian formalism is developed for a general nondissipative quasiperiodic nonlinear wave with trapped particles in collisionless plasma. The adiabatic time-averaged Lagrangian density L is expressed in terms of the single-particle oscillation-center Hamiltonians; once those are found, the compl ... [Phys. Plasmas 19, 012102 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569571 Sat, 07 Jan 2012 07:48:42 +0100 5569571 Adiabatic nonlinear waves with trapped particles. II. Wave dispersion http://www.medworm.com/index.php?rid=5569570&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012103%2F1%26agg%3Drss I. Y. Dodin and N. J. Fisch A general nonlinear dispersion relation is derived in a nondifferential form for an adiabatic sinusoidal Langmuir wave in collisionless plasma, allowing for an arbitrary distribution of trapped electrons. The linear dielectric function is generalized, and the nonlinear kinetic frequency shift omega ... [Phys. Plasmas 19, 012103 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569570 Sat, 07 Jan 2012 07:48:42 +0100 5569570 Adiabatic nonlinear waves with trapped particles. III. Wave dynamics http://www.medworm.com/index.php?rid=5569569&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F19%2F012104%2F1%26agg%3Drss I. Y. Dodin and N. J. Fisch The evolution of adiabatic waves with autoresonant trapped particles is described within the Lagrangian model developed in Paper I, under the assumption that the action distribution of these particles is conserved, and, in particular, that their number within each wavelength is a fixed independent p ... [Phys. Plasmas 19, 012104 (2012)] published Fri Jan 6, 2012. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5569569 Sat, 07 Jan 2012 07:48:42 +0100 5569569 Large amplitude solitary waves in ion-beam plasmas with charged dust impurities http://www.medworm.com/index.php?rid=5556982&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122112%2F1%26agg%3Drss A. P. Misra and N. C. Adhikary The nonlinear propagation of large amplitude dust ion-acoustic (DIA) solitary waves (SWs) in an ion-beam plasma with stationary charged dusts is investigated. For typical plasma parameters relevant for experiments [Y. Nakamura and K. Komatsuda, J. Plasma Phys. 60, 69 (1998)], when the beam speed is ... [Phys. Plasmas 18, 122112 (2011)] published Fri Dec 30, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5556982 Mon, 02 Jan 2012 08:08:12 +0100 5556982 Gyrokinetic determination of the electrostatic potential of rotating magnetic islands in tokamaks http://www.medworm.com/index.php?rid=5556981&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122506%2F1%26agg%3Drss M. Siccinio, E. Poli, F. J. Casson, W. A. Hornsby, and A. G. Peeters The electrostatic potential related to a magnetic island structure with imposed width and rotation frequency is studied by means of gyrokinetic simulations, which allow its self-consistent determination via the Poisson equation. An adiabatic response of the trapped ions at the island separatrix lead ... [Phys. Plasmas 18, 122506 (2011)] published Fri Dec 30, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5556981 Mon, 02 Jan 2012 08:08:12 +0100 5556981 Linear and nonlinear verification of gyrokinetic microstability codes http://www.medworm.com/index.php?rid=5556980&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122505%2F1%26agg%3Drss R. V. Bravenec, J. Candy, M. Barnes, and C. Holland Verification of nonlinear microstability codes is a necessary step before comparisons or predictions of turbulent transport in toroidal devices can be justified. By verification we mean demonstrating that a code correctly solves the mathematical model upon which it is based. Some degree of verificat ... [Phys. Plasmas 18, 122505 (2011)] published Fri Dec 30, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5556980 Mon, 02 Jan 2012 08:08:12 +0100 5556980 Nonlinear oscillations and waves in an arbitrary mass ratio cold plasma http://www.medworm.com/index.php?rid=5556979&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122111%2F1%26agg%3Drss Prabal Singh Verma It is well known that nonlinear standing oscillations in an arbitrary mass ratio cold plasma always phase mix away. However, there exist nonlinear electron-ion traveling wave solutions, which do not exhibit phase mixing because they have zero ponderomotive force. The existence of these waves has bee ... [Phys. Plasmas 18, 122111 (2011)] published Fri Dec 30, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5556979 Mon, 02 Jan 2012 08:08:12 +0100 5556979 Wave and transport studies utilizing dense plasma filaments generated with a lanthanum hexaboride cathode http://www.medworm.com/index.php?rid=5550204&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123501%2F1%26agg%3Drss B. Van Compernolle, W. Gekelman, P. Pribyl, and C. M. Cooper A portable lanthanum hexaboride (LaB) cathode has been developed for use in the LArge Plasma Device (LAPD) at UCLA. The LaB cathode can be used as a tool for many different studies in experimental plasma physics. To date, the cathode has been used as a source of a plasma with a hot dense core for tr ... [Phys. Plasmas 18, 123501 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550204 Thu, 29 Dec 2011 18:54:27 +0100 5550204 The stability of the mesospheric plasma layer http://www.medworm.com/index.php?rid=5550203&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122902%2F1%26agg%3Drss B. P. Pandey and S. V. Vladimirov The presence of micron and sub-micron size dust in the Earth's summer mesopause are a possible cause of electron density depletion. Whereas electrons in this weakly ionized and weakly magnetized layer are frozen in the magnetic field, the ions and dust are highly diffusive. This relative drift betwe ... [Phys. Plasmas 18, 122902 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550203 Thu, 29 Dec 2011 18:54:27 +0100 5550203 Numerical investigation of pulse-modulated atmospheric radio frequency discharges in helium under different duty cycles http://www.medworm.com/index.php?rid=5550202&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123502%2F1%26agg%3Drss Jizhong Sun, Qi Wang, Zhengfen Ding, Xuechun Li, and Dezhen Wang Experiments observed that the pulse duty cycle has effects on the plasma homogeneity in pulse-modulated radio frequency (rf) discharges. In this paper, pulse-modulated rf (13.56 MHz) helium discharges are theoretically investigated using a two dimensional fluid model. With the pulse period being fix ... [Phys. Plasmas 18, 123502 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550202 Thu, 29 Dec 2011 18:54:27 +0100 5550202 Nonlinear lower hybrid oscillations in a cold viscous plasma http://www.medworm.com/index.php?rid=5550201&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F124502%2F1%26agg%3Drss Chandan Maity and Nikhil Chakrabarti An analytical description of nonlinear lower hybrid oscillations in a cold quasi-neutral plasma in the presence of viscosity is presented in one spatial dimension by using Lagrangian variables. By treating viscosity coefficients of the electron and ion fluids as inversely proportional to their respe ... [Phys. Plasmas 18, 124502 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550201 Thu, 29 Dec 2011 18:54:27 +0100 5550201 Onset conditions for positive direct current corona discharges in air under the action of photoionization http://www.medworm.com/index.php?rid=5550200&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123503%2F1%26agg%3Drss Yuesheng Zheng, Bo Zhang, and Jinliang He This paper presents a numerical model for the inception of positive dc corona discharges in air near cylindrical anodes, which plays a bridge role between the classic positive corona onset criterion and the photoionization model considering the effective radiation wavelength. The predicted onset vol ... [Phys. Plasmas 18, 123503 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550200 Thu, 29 Dec 2011 18:54:27 +0100 5550200 Bounce-free spherical hydrodynamic implosion http://www.medworm.com/index.php?rid=5550199&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F120702%2F1%26agg%3Drss Grigory Kagan, Xian-Zhu Tang, Scott C. Hsu, and Thomas J. Awe In a bounce-free spherical hydrodynamic implosion, the post-stagnation hot core plasma does not expand against the imploding flow. Such an implosion scheme has the advantage of improving the dwell time of the burning fuel, resulting in a higher fusion burn-up fraction. The existence of bounce-free s ... [Phys. Plasmas 18, 120702 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550199 Thu, 29 Dec 2011 18:54:27 +0100 5550199 Plasma-based multistage virtual cathode radiation http://www.medworm.com/index.php?rid=5550198&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123104%2F1%26agg%3Drss Dong Su and Changjian Tang A plasma-based multistage virtual cathode radiation is proposed. Multistage virtual cathode can be formed as an electron beam passes through a high dense ion background. The reflected electrons can be coupled with transverse magnetic wave, and electromagnetic radiation is detected. Unlike the tradit ... [Phys. Plasmas 18, 123104 (2011)] published Tue Dec 27, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550198 Thu, 29 Dec 2011 18:54:27 +0100 5550198 Energetics and energy scaling of quasi-monoenergetic protons in laser radiation pressure acceleration http://www.medworm.com/index.php?rid=5550197&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123105%2F1%26agg%3Drss Tung-Chang Liu, Xi Shao, Chuan-Sheng Liu, Jao-Jang Su, Bengt Eliasson et al. Theoretical and computational studies of the ion energy scaling of the radiation pressure acceleration of an ultra-thin foil by short pulse intense laser irradiation are presented. To obtain a quasi-monoenergetic ion beam with an energy spread of less than 20%, two-dimensional particle-in-cell simul ... [Phys. Plasmas 18, 123105 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550197 Thu, 29 Dec 2011 18:54:27 +0100 5550197 X-transport of ions in diverted tokamaks, with application to DIII-D http://www.medworm.com/index.php?rid=5550196&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122504%2F1%26agg%3Drss Weston M. Stacey A calculation model for X-transport due to the radially outward grad-B and curvature drift of ions trapped poloidally in the null-B X-region just inside the X-point in diverted tokamaks is presented. Calculations are presented for two representative DIII-D [J. Luxon, Nucl. Fusion 42, 614 (2002)] sho ... [Phys. Plasmas 18, 122504 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550196 Thu, 29 Dec 2011 18:54:27 +0100 5550196 Terahertz generation from laser filaments in the presence of a static electric field in a plasma http://www.medworm.com/index.php?rid=5550195&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123106%2F1%26agg%3Drss Lalita Bhasin and V. K. Tripathi Two femtosecond laser pulses with frequencies omega and omega that undergo filamentation in a plasma couple nonlinearly in the presence of a transverse, static electric field to generate terahertz wave at the frequency omega-omega. The coupling is enhanced in the presence of the static electric fiel ... [Phys. Plasmas 18, 123106 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550195 Thu, 29 Dec 2011 18:54:27 +0100 5550195 Eigenmodes of quasi-static magnetic islands in current sheet http://www.medworm.com/index.php?rid=5550194&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122110%2F1%26agg%3Drss Yi Li, Xiaohui Cai, Lihui Chai, Huinan Zheng, Chao Shen et al. As observation have shown, magnetic islands often appear before and/or after the onset of magnetic reconnections in the current sheets, and they also appear in the current sheets in the solar corona, Earth's magnetotail, and Earth's magnetopause. Thus, the existence of magnetic islands can affect th ... [Phys. Plasmas 18, 122110 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550194 Thu, 29 Dec 2011 18:54:27 +0100 5550194 Adiabatic effects on nonlinear dust-acoustic solitary and shock waves in a strongly coupled dusty plasma http://www.medworm.com/index.php?rid=5550193&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123702%2F1%26agg%3Drss M. S. Rahman and A. A. Mamun A theoretical investigation has been performed on a strongly coupled dusty plasma containing strongly correlated negatively charged dust grains and weakly correlated adiabatic electrons and ions. The adiabatic effects on the dust-acoustic (DA) solitary and shock waves propagating in such a strongly ... [Phys. Plasmas 18, 123702 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550193 Thu, 29 Dec 2011 18:54:27 +0100 5550193 Electrostatic solitary structures in presence of non-thermal electrons and a warm electron beam on the auroral field lines http://www.medworm.com/index.php?rid=5550192&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122306%2F1%26agg%3Drss S. V. Singh, G. S. Lakhina, R. Bharuthram, and S. R. Pillay Electrostatic solitary waves (ESWs) have been observed by satellites in the auroral region of the Earth's magnetosphere. These ESWs are found to be having both positive and negative electrostatic potentials. Using the Sagdeeev psuedo-potential technique, arbitrary amplitude electron-acoustic solitar ... [Phys. Plasmas 18, 122306 (2011)] published Thu Dec 29, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5550192 Thu, 29 Dec 2011 18:54:27 +0100 5550192 On relaxation and transport in gyrokinetic drift wave turbulence with zonal flow http://www.medworm.com/index.php?rid=5534198&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122305%2F1%26agg%3Drss We present a theory for relaxation and transport in phase space for gyrokinetic drift wave turbulence with zonal flow. The interaction between phase space eddys and zonal flows is considered in two different limits, namely for K>>1 and K ~= 1 where K is the Kubo number. For K>>1, the growth of an is ... [Phys. Plasmas 18, 122305 (2011)] published Tue Dec 20, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5534198 Fri, 23 Dec 2011 14:19:45 +0100 5534198 Vlasov simulation in multiple spatial dimensions http://www.medworm.com/index.php?rid=5534197&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122109%2F1%26agg%3Drss Harvey A. Rose and William Daughton A long-standing challenge encountered in modeling plasma dynamics is achieving practical Vlasov equation simulation in multiple spatial dimensions over large length and time scales. While direct multi-dimension Vlasov simulation methods using adaptive mesh methods [M. Gutnic et al., Comput. Phys. Co ... [Phys. Plasmas 18, 122109 (2011)] published Tue Dec 20, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5534197 Fri, 23 Dec 2011 14:19:45 +0100 5534197 Measurements and simulations of shock wave generated plasma-vacuum interface http://www.medworm.com/index.php?rid=5534196&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F120701%2F1%26agg%3Drss D. Kaganovich, M. H. Helle, D. F. Gordon, and A. Ting A controlled gradient gas jet was designed, constructed, and tested at the Naval Research Laboratory for the generation of high density and sharp gradient plasma regions. The gas jet uses a laser-generated shock wave to control the density gradient at the vacuum and neutral gas interface. The length ... [Phys. Plasmas 18, 120701 (2011)] published Wed Dec 21, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5534196 Fri, 23 Dec 2011 14:19:45 +0100 5534196 Current-free double layers: A review http://www.medworm.com/index.php?rid=5512961&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122105%2F1%26agg%3Drss Nagendra Singh During the last decade, there has been an upsurge in the research on current-free DLs (CFDLs). Research includes theory, laboratory measurements, and various applications of CFDLs ranging from plasma thrusters to acceleration of charged particles in space and astrophysical plasmas. The purpose of th ... [Phys. Plasmas 18, 122105 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512961 Sat, 17 Dec 2011 13:53:03 +0100 5512961 High-current discharge channel contraction in high density gas http://www.medworm.com/index.php?rid=5512960&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122702%2F1%26agg%3Drss Ph. G. Rutberg, A. A. Bogomaz, M. E. Pinchuk, A. V. Budin, A. G. Leks et al. Research results for discharges at current amplitudes of 0.51.6 MA and current rise rate of ~10 A/s are presented. The discharge is performed in the hydrogen environment at the initial pressure of 535 MPa. Initiation is implemented by a wire explosion. The time length of the first half-period of the ... [Phys. Plasmas 18, 122702 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512960 Sat, 17 Dec 2011 13:53:03 +0100 5512960 A new mode and its interaction through ponderomotive force in electron-positron-ion plasmas http://www.medworm.com/index.php?rid=5512959&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122106%2F1%26agg%3Drss Q. Haque, N. L. Tsintsadze, and W. Masood A new mode is found in e-p-i plasma in the presence of density and temperature difference of lighter particles. The electron beam induced Cherenkov instability condition for the excitation of positron sound wave is obtained for the system under consideration. Zakharov's equation with sign modificati ... [Phys. Plasmas 18, 122106 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512959 Sat, 17 Dec 2011 13:53:03 +0100 5512959 Decays of electron Bernstein waves near plasma edge http://www.medworm.com/index.php?rid=5512958&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122107%2F1%26agg%3Drss Nong Xiang and John R. Cary Nonlinear wave-wave couplings near the upper hybrid resonance are studied via particle-in-cell simulations. It is found that the decay of an electron Bernstein wave (EBW) depends on the ratio of the incident frequency and electron cyclotron frequency. For ratios less than two, parametric decay into ... [Phys. Plasmas 18, 122107 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512958 Sat, 17 Dec 2011 13:53:03 +0100 5512958 Cross-correlation based time delay estimation for turbulent flow velocity measurements: Statistical considerations http://www.medworm.com/index.php?rid=5512957&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122304%2F1%26agg%3Drss Balazs Tal, Attila Bencze, Sandor Zoletnik, Gabor Veres, and Gabor Por Time delay estimation methods (TDE) are well-known techniques to investigate poloidal flows in hot magnetized plasmas through the propagation properties of turbulent structures in the medium. One of these methods is based on the estimation of the time lag at which the cross-correlation function (CCF ... [Phys. Plasmas 18, 122304 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512957 Sat, 17 Dec 2011 13:53:03 +0100 5512957 The inner structure of collisionless magnetic reconnection: The electron-frame dissipation measure and Hall fields http://www.medworm.com/index.php?rid=5512956&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122108%2F1%26agg%3Drss Seiji Zenitani, Michael Hesse, Alex Klimas, Carrie Black, and Masha Kuznetsova It was recently proposed that the electron-frame dissipation measure, the energy transfer from the electromagnetic field to plasmas in the electron's rest frame, identifies the dissipation region of collisionless magnetic reconnection [Zenitani et al., Phys. Rev. Lett. 106, 195003 (2011)]. The measu ... [Phys. Plasmas 18, 122108 (2011)] published Wed Dec 14, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5512956 Sat, 17 Dec 2011 13:53:03 +0100 5512956 Energy budgets in collisionless magnetic reconnection: Ion heating and bulk acceleration http://www.medworm.com/index.php?rid=5501590&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122901%2F1%26agg%3Drss N. Aunai, G. Belmont, and R. Smets This paper investigates the energy transfer in the process of collisionless antiparallel magnetic reconnection. Using two-dimensional hybrid simulations, we measure the increase of the bulk and thermal kinetic energies and compare it to the loss of magnetic energy through a contour surrounding the i ... [Phys. Plasmas 18, 122901 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501590 Wed, 14 Dec 2011 15:18:32 +0100 5501590 Isotope mass and charge effects in tokamak plasmas http://www.medworm.com/index.php?rid=5501589&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122501%2F1%26agg%3Drss I. Pusztai, J. Candy, and P. Gohil The effect of primary ion species of differing charge and massspecifically, deuterium, hydrogen, and heliumon instabilities and transport is studied in DIII-D plasmas through gyrokinetic simulations with gyro [J. Candy and E. Belli, General Atomics Technical Report No. GA-A26818, 2010]. In linear si ... [Phys. Plasmas 18, 122501 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501589 Wed, 14 Dec 2011 15:18:32 +0100 5501589 Parallel and perpendicular velocity sheared flows driven tripolar vortices in an inhomogeneous electron-ion quantum magnetoplasma http://www.medworm.com/index.php?rid=5501588&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122701%2F1%26agg%3Drss Arshad M. Mirza and W. Masood Nonlinear equations governing the dynamics of finite amplitude drift-ion acoustic-waves are derived by taking into account sheared ion flows parallel and perpendicular to the ambient magnetic field in a quantum magnetoplasma comprised of electrons and ions. It is shown that stationary solution of th ... [Phys. Plasmas 18, 122701 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501588 Wed, 14 Dec 2011 15:18:32 +0100 5501588 Asymptotic equilibrium between Langmuir turbulence and suprathermal electrons http://www.medworm.com/index.php?rid=5501587&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122303%2F1%26agg%3Drss Peter H. Yoon In both laboratory and natural environment such as the solar wind, suprathermal, or non-Maxwellian electron distributions are frequently observed. Electron velocity distribution functions containing non-Maxwellian, power-law energetic tail component are often modeled by the so-called kappa distribut ... [Phys. Plasmas 18, 122303 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501587 Wed, 14 Dec 2011 15:18:32 +0100 5501587 Mean-field Ohm's law and coaxial helicity injection in force-free plasmas http://www.medworm.com/index.php?rid=5501586&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122502%2F1%26agg%3Drss R. H. Weening A theoretical analysis of steady-state coaxial helicity injection (CHI) in force-free plasmas is presented using a parallel mean-field Ohm's law that includes resistivity eta and hyper-resistivity Lambda terms. Using Boozer coordinates, a partial differential equation is derived for the time evoluti ... [Phys. Plasmas 18, 122502 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501586 Wed, 14 Dec 2011 15:18:32 +0100 5501586 Kadomtsev-Petviashvili solitons propagation in a plasma system with superthermal and weakly relativistic effects http://www.medworm.com/index.php?rid=5501585&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122302%2F1%26agg%3Drss Hafeez-Ur-Rehman, Asif Shah, S. Mahmood, and Q. Haque Two dimensional (2D) solitons are studied in a plasma system comprising of relativistically streaming ions, kappa distributed electrons, and positrons. Kadomtsev-Petviashvili (KP) equation is derived through the reductive perturbation technique. Analytical solution of the KP equation has been studie ... [Phys. Plasmas 18, 122302 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501585 Wed, 14 Dec 2011 15:18:32 +0100 5501585 The dynamics of ion with electrostatic waves in a sheared magnetic field http://www.medworm.com/index.php?rid=5501584&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122104%2F1%26agg%3Drss Limin Yu, Xianmei Zhang, and Zheng-Mao Sheng The interaction between an ion and multiple electrostatic waves propagating perpendicularly to an ambient magnetic field with shear is investigated. Based on the Lie transformation method, with the wave amplitude and the magnetic shear both as the perturbation parameters, the analytical formulas for ... [Phys. Plasmas 18, 122104 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501584 Wed, 14 Dec 2011 15:18:32 +0100 5501584 Modeling of 10 GeV-1 TeV laser-plasma accelerators using Lorentz boosted simulations http://www.medworm.com/index.php?rid=5501583&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123103%2F1%26agg%3Drss J.-L. Vay, C. G. R. Geddes, E. Esarey, C. B. Schroeder, W. P. Leemans et al. Modeling of laser-plasma wakefield accelerators in an optimal frame of reference [J.-L. Vay, Phys. Rev. Lett. 98, 130405 (2007)] allows direct and efficient full-scale modeling of deeply depleted and beam loaded laser-plasma stages of 10 GeV-1 TeV (parameters not computationally accessible otherwise ... [Phys. Plasmas 18, 123103 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501583 Wed, 14 Dec 2011 15:18:32 +0100 5501583 Analytic model for coaxial helicity injection in tokamak plasmas http://www.medworm.com/index.php?rid=5501582&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122503%2F1%26agg%3Drss R. H. Weening Using a partial differential equation for the time evolution of the mean-field poloidal magnetic flux that incorporates resistivity eta and hyper-resistivity Lambda terms, an exact analytic solution is obtained for steady-state coaxial helicity injection (CHI) in force-free large aspect ratio tokama ... [Phys. Plasmas 18, 122503 (2011)] published Tue Dec 13, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5501582 Wed, 14 Dec 2011 15:18:32 +0100 5501582 Nonlinear stability of the ideal magnetohydrodynamic interchange mode at marginal conditions in a transverse magnetic field http://www.medworm.com/index.php?rid=5492971&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122103%2F1%26agg%3Drss Jupiter Bagaipo, P. N. Guzdar, and A. B. Hassam The stability of the ideal magnetohydrodynamic (MHD) interchange mode at marginal conditions is studied. A sufficiently strong constant magnetic field component transverse to the direction of mode symmetry provides the marginality conditions. A systematic perturbation analysis in the smallness param ... [Phys. Plasmas 18, 122103 (2011)] published Fri Dec 9, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5492971 Sun, 11 Dec 2011 15:13:30 +0100 5492971 Publisher's Note: Fluid and drift-kinetic description of a magnetized plasma with low collisionality and slow dynamics orderings. II. Ion theory [Phys. Plasmas. 18, 102506 (2011)] http://www.medworm.com/index.php?rid=5492970&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F129901%2F1%26agg%3Drss J. J. Ramos Abstract not available. [Phys. Plasmas 18, 129901 (2011)] published Fri Dec 9, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5492970 Sun, 11 Dec 2011 15:13:30 +0100 5492970 Collective microdynamics and noise suppression in dispersive electron beam transport http://www.medworm.com/index.php?rid=5492969&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F123102%2F1%26agg%3Drss Avraham Gover, Egor Dyunin, Tamir Duchovni, and Ariel Nause A general formulation is presented for deep collective interaction micro-dynamics in dispersive e-beam transport. In the regime of transversely coherent interaction, the formulation is applicable to both coherent and random temporal modulation of the electron beam. We demonstrate its use for determi ... [Phys. Plasmas 18, 123102 (2011)] published Fri Dec 9, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5492969 Sun, 11 Dec 2011 15:13:30 +0100 5492969 Investigation of tearing instability using GeFi particle simulation model http://www.medworm.com/index.php?rid=5492968&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122102%2F1%26agg%3Drss X. Y. Wang, Y. Lin, L. Chen, X. Lu, and W. Kong The gyrokinetic (GK) electron and fully kinetic ion (GeFi) simulation model of Lin et al. [Plasmas Phys. Controlled Fusion 53, 054013 (2011)] has been thoroughly benchmarked and validated for a two-dimensional (2D) Harris current sheet with a finite guide field. First, a gyrokinetic eigenmode theory ... [Phys. Plasmas 18, 122102 (2011)] published Fri Dec 9, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5492968 Sun, 11 Dec 2011 15:13:30 +0100 5492968 Simulating gyrokinetic microinstabilities in stellarator geometry with GS2 http://www.medworm.com/index.php?rid=5483889&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122301%2F1%26agg%3Drss J. A. Baumgaertel, E. A. Belli, W. Dorland, W. Guttenfelder, G. W. Hammett et al. The nonlinear gyrokinetic code GS2 has been extended to treat non-axisymmetric stellarator geometry. Electromagnetic perturbations and multiple trapped particle regions are allowed. Here, linear, collisionless, electrostatic simulations of the quasi-axisymmetric, three-field period national compact ... [Phys. Plasmas 18, 122301 (2011)] published Mon Dec 5, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5483889 Thu, 08 Dec 2011 14:35:58 +0100 5483889 Enhanced thermal self-focusing of a Gaussian laser beam in a collisionless plasma http://www.medworm.com/index.php?rid=5483888&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F124501%2F1%26agg%3Drss Devki Nandan Gupta and Hyyong Suk Theory given by Wang-Zhou [Phys. Plasmas 18, 043101 (2011)] for the thermal self-focusing of a Gaussian laser beam in a collisionless plasma is revisited by including the effect of a localized upward plasma-density ramp. As the equilibrium electron density is an increasing function of the distance o ... [Phys. Plasmas 18, 124501 (2011)] published Wed Dec 7, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5483888 Thu, 08 Dec 2011 14:35:58 +0100 5483888 Rotating-filaments-pairs in a hexagonal superlattice state in dielectric barrier discharge http://www.medworm.com/index.php?rid=5483887&cid=s_37779_75_f&fid=37779&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FPHP%2F18%2F122101%2F1%26agg%3Drss Lifang Dong, Yujie Yang, Ben Li, Weili Fan, and Qian Song Rotating-filaments-pairs in a hexagonal superlattice state (HSS) are studied in a dielectric barrier discharge system. The evolution and phase diagrams of HSS are given. The wavelength of HSS and the mean diameter of the two rotating filaments all decrease with the increase of applied voltage. The i ... [Phys. Plasmas 18, 122101 (2011)] published Wed Dec 7, 2011. (Source: Physics of Plasmas) Physics of Plasmas journals http://www.medworm.com/rss/comments.php?id=5483887 Thu, 08 Dec 2011 14:35:58 +0100 5483887