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Recent developments in mathematical relativityEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Journal of Geometry and Physics, Volume 62, Issue 3, pages 567-706 (March 2012) Edited by Graham S. Hall, Ugo Bruzzo (Source: Elsevier Updates: Physics)
Source: Elsevier Updates: Physics - February 3, 2012 Category: Physics Source Type: news

Computational Optical MeasurementEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Optics and Lasers in Engineering, Volume 50, Issue 4, pages 513-618 (April 2012) Edited by Qian Kemao (Source: Elsevier Updates: Physics)
Source: Elsevier Updates: Physics - February 3, 2012 Category: Physics Source Type: news

Note: Absolute calibration of two DRZ phosphor screens using ultrashort electron bunchEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This article gives the absolute calibration of two types phosphor screens (DRZ) that were used to detect and characterize electron bunches driven by laser-plasma accelerator. The test was performed with picoseconds electron bunch at a radio frequency linear electron accelerator in Tsinghua Universit ... [Rev. Sci. Instrum. 83, 026101 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Preface: Proceedings of the 14th International Conference on Ion Sources, Giardini Naxos, Italy, 2011Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. Gammino and L. Celona Abstract not available. [Rev. Sci. Instrum. 83, 02A101 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Concept for a fourth generation electron cyclotron resonance ion sourceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
C. Lyneis, P. Ferracin, S. Caspi, A. Hodgkinson, and G. L. Sabbi A fourth generation electron cyclotron resonance ion source with an operating frequency between 40 and 56 GHz has the potential to quadruple the heavy-ion beam currents and provide a cost effective upgrade path for heavy ion drivers in use or in the planning stage at radioactive beam facilities. Des ... [Rev. Sci. Instrum. 83, 02A301 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Upgraded vacuum arc ion source for metal ion implantationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. G. Nikolaev, E. M. Oks, K. P. Savkin, G. Yu. Yushkov, and I. G. Brown Vacuum arc ion sources have been made and used by a large number of research groups around the world over the past twenty years. The first generation of vacuum arc ion sources (dubbed Mevva, for metal vapor vacuum arc) was developed at Lawrence Berkeley National Laboratory in the 1980s. This paper c ... [Rev. Sci. Instrum. 83, 02A501 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Optimizing the front end test stand high performance H ion source at RALEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
D. Faircloth, S. Lawrie, C. Gabor, A. Letchford, M. Whitehead et al. The aim of the front end test stand project is to demonstrate that chopped low energy H beams of high quality can be produced. The beam line currently consists of the ion source, a 3 solenoid low energy beam transport and a suite of diagnostics. A brief status report of the radio frequency quadrupol ... [Rev. Sci. Instrum. 83, 02A701 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Charge breeding simulations for radioactive ion beam productionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
V. Variale, A. C. Raino, and T. Clauser The charge breeding technique is used for radioactive ion beam (RIB) production in order of optimizing the re-acceleration of the radioactive element ions produced by a primary beam in a thick target. Charge breeding is achieved by means of a device capable of increasing the ion charge state from 1+ ... [Rev. Sci. Instrum. 83, 02A901 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Effect of fast positive ions incident on caesiated plasma grid of negative ion sourceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M. Bacal This paper describes the effect on negative ion formation on a caesiated surface of the backscattering of positive ions approaching it with energy of a few tens of eV. For a positive ion energy of 45 eV, the surface produced negative ion current density due to these fast positive ions is 12 times la ... [Rev. Sci. Instrum. 83, 02B101 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Low-energy, high-current, ion source with cold electron emitterEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. V. Vizir, M. V. Shandrikov, G. Yu. Yushkov, and E. M. Oks An ion source based on a two-stage discharge with electron injection from a cold emitter is presented. The first stage is the emitter itself, and the second stage provides acceleration of injected electrons for gas ionization and formation of ion flow ( (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Shot-to-shot reproducibility in the emission of fast highly charged metal ions from a laser ion sourceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. Krasa, A. Velyhan, D. Margarone, E. Krousky, L. Laska et al. The generation of fast highly charged metal ions with the use of the sub-nanosecond Prague Asterix Laser System, operated at a fundamental wavelength of 1315 nm, is reported. Particular attention is paid to shot-to-shot reproducibility in the ion emission. Au and Pd targets were exposed to intensiti ... [Rev. Sci. Instrum. 83, 02B302 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Status of the laser ion source at IMPEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. Sha, H. W. Zhao, X. H. Guo, Z. L. Zhang, X. Fang et al. A laser (Nd:YAG laser, 3 J, 1064 nm, 810 ns) ion source has been built and under development at IMP to provide pulsed high-charge-state heavy ion beams to a radio frequency quadrupole (RFQ) for upgrading the IMP accelerators with a new low-energy beam injector. The laser ion source currently operate ... [Rev. Sci. Instrum. 83, 02B303 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Optimizing a microwave gas ion source for continuous-flow accelerator mass spectrometryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
K. F. von Reden, M. L. Roberts, J. R. Burton, and S. R. Beaupre A 2.45 GHz microwave ion source coupled with a magnesium charge exchange canal (C x C) has been successfully adapted to a large acceptance radiocarbon accelerator mass spectrometry system at the National Ocean Sciences Accelerator Mass Spectrometry (AMS) Facility, Woods Hole Oceanographic Institut ... [Rev. Sci. Instrum. 83, 02B304 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

A new structure of superconducting magnetic system for 50 GHz operations (invited)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
D. Z. Xie High field and high frequency have been leading the development of electron cyclotron resonance ion sources (ECRISs) in the past decade as demonstrated by the achieved great performance. The present superconducting magnet structures built with NbTi wires have reached an axial field of 3.54.0 T and a ... [Rev. Sci. Instrum. 83, 02A302 (2012)] published Wed Feb 1, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Characteristics of low-energy ion beams extracted from a wire electrode geometryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M. Vasquez, Jr., S. Tokumura, T. Kasuya, S. Maeno, and M. Wada Beams of argon ions with energies less than 50 eV were extracted from an ion source through a wire electrode extractor geometry. A retarding potential energy analyzer (RPEA) was constructed in order to characterize the extracted ion beams. The single aperture RPEA was used to determine the ion energ ... [Rev. Sci. Instrum. 83, 023301 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Active noise cancellation in a suspended interferometerEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Jennifer C. Driggers, Matthew Evans, Keenan Pepper, and Rana Adhikari We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common least mean square adaptive filter algorithm. We compare the experimental results with theoretical estimates of the cancellation efficiency. Using data from the ... [Rev. Sci. Instrum. 83, 024501 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Performance of a fast digital integrator in on-field magnetic measurements for particle acceleratorsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
P. Arpaia, L. Bottura, L. Fiscarelli, and L. Walckiers The fast digital integrator has been conceived to face most demanding magnet test requirements with a resolution of 10 ppm, a signal-to-noise ratio of 105 dB at 20 kHz, a time resolution of 50 ns, an offset of 10 ppm, and on-line processing. In this paper, the on-field achievements of the fast digit ... [Rev. Sci. Instrum. 83, 024702 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Generalized four-point characterization method using capacitive and ohmic contactsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Brian S. Kim, Wang Zhou, Yash D. Shah, Chuanle Zhou, N. Işık et al. In this paper, a four-point characterization method is developed for samples that have either capacitive or ohmic contacts. When capacitive contacts are used, capacitive current- and voltage-dividers result in a capacitive scaling factor not present in four-point measurements with only ohmic contact ... [Rev. Sci. Instrum. 83, 024703 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

High temperature Seebeck coefficient and resistance measurement system for thermoelectric materials in the thin disk geometryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
P. H. Michael Bottger, E. Flage-Larsen, O. B. Karlsen, and Terje G. Finstad A versatile apparatus to measure the cross-plane Seebeck coefficient and the resistivity of bulk samples shaped as disks or thin plates, over a temperature range of 300 K620 K with possible extension to higher temperatures, is presented. It is constructed from readily available equipment and instrum ... [Rev. Sci. Instrum. 83, 025101 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Compact cryogenic source of periodic hydrogen and argon droplet beams for relativistic laser-plasma generationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present a cryogenic source of periodic streams of micrometer-sized hydrogen and argon droplets as ideal mass-limited target systems for fundamental intense laser-driven plasma applications. The highly compact design combined with a high temporal and spatial droplet stability makes our injector id ... [Rev. Sci. Instrum. 83, 025102 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Note: Rotational compliance and instantaneous center of rotation in segmented and V-shaped notch hingesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yakov Tseytlin This note shows a technique for the calculation of rotational compliance (stiffness) and develops a generalized mathematical model for the virtual center of rotation position in concave, segmented, and V-shaped notch hinges using Chebyshev's polynomials. The calculational results are in a good agree ... [Rev. Sci. Instrum. 83, 026102 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Effect of pulse-modulated microwaves on fullerene ion production with electron cyclotron resonance ion sourceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
T. Asaji, T. Uchida, H. Minezaki, K. Oshima, R. Racz et al. Fullerene plasmas generated by pulse-modulated microwaves have been investigated under typical conditions at the Bio-Nano electron cyclotron resonance ion source. The effect of the pulse modulation is distinct from that of simply structured gases, and then the density of the fullerene plasmas increa ... [Rev. Sci. Instrum. 83, 02A303 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Operation of the CAPRICE electron cyclotron resonance ion source applying frequency tuning and double frequency heatingEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
F. Maimone, K. Tinschert, L. Celona, R. Lang, J. Mader et al. The properties of the electromagnetic waves heating the electrons of the ECR ion sources (ECRIS) plasma affect the features of the extracted ion beams such as the emittance, the shape, and the current, in particular for higher charge states. The electron heating methods such as the frequency tuning ... [Rev. Sci. Instrum. 83, 02A304 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Characterization of the versatile ion source and possible applications as injector for future projectsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
R. Miracoli, L. Celona, G. Castro, D. Mascali, S. Gammino et al. The versatile ion source (VIS) is an off-resonance microwave discharge ion source which generates a slightly overdense plasma (n [approximate] 10 cm) operating at 2.45 GHz and producing more than 50 mA of proton beams. A detailed characterization of the source, by operating between 60 and 75 kV, in ... [Rev. Sci. Instrum. 83, 02A305 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Electron cyclotron resonance ion source plasma chamber studies using a network analyzer as a loaded cavity probeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
V. Toivanen, O. Tarvainen, C. Lyneis, J. Kauppinen, J. Komppula et al. A method and first results utilizing a network analyzer as a loaded cavity probe to study the resonance properties of a plasma filled electron cyclotron resonance ion source (ECRIS) plasma chamber are presented. The loaded cavity measurements have been performed using a dual port technique, in which ... [Rev. Sci. Instrum. 83, 02A306 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Advanced light ion source extraction system for a new electron cyclotron resonance ion source geometry at SaclayEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
O. Delferriere, R. Gobin, F. Harrault, S. Nyckees, Y. Sauce et al. One of the main goal of intense light ion injector projects such as IPHI, IFMIF, or SPIRAL2, is to produce high current beams while keeping transverse emittance as low as possible. To prevent emittance growth induced in a dual solenoid low energy transfer line, its length has to be minimized. This c ... [Rev. Sci. Instrum. 83, 02A307 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Results of RIKEN superconducting electron cyclotron resonance ion source with 28 GHzEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Y. Higurashi, J. Ohnishi, T. Nakagawa, H. Haba, M. Tamura et al. We measured the beam intensity of highly charged heavy ions and x-ray heat load for RIKEN superconducting electron cyclotron resonance ion source with 28 GHz microwaves under the various conditions. The beam intensity of Xe became maximum at B ~ 0.65 T, which was ~65% of the magnetic field strength ... [Rev. Sci. Instrum. 83, 02A308 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

First neutral beam injection experiments on KSTAR tokamakEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. H. Jeong, D. H. Chang, T. S. Kim, S. R. In, K. W. Lee et al. The first neutral beam (NB) injection system of the Korea Superconducting Tokamak Advanced Research (KSTAR) tokamak was partially completed in 2010 with only 1/3 of its full design capability, and NB heating experiments were carried out during the 2010 KSTAR operation campaign. The ion source is com ... [Rev. Sci. Instrum. 83, 02B102 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Laser produced streams of Ge ions accelerated and optimized in the electric fields for implantation into SiO substratesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M. Rosinski, L. Giuffrida, P. Parys, P. Gasior, E. Fazio et al. Ge crystals were prepared by means of laser-induced ion implantation technique. A Nd:YAG pulsed laser (repetition rate: 10 Hz; pulse duration: 3.5 ns; pulse energy: ~0.5 J) was used both as an ion source and to carry out the ablation processes. The optimization of the laser-generated ion beam parame ... [Rev. Sci. Instrum. 83, 02B305 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Compression and focusing a laser produced plasma using a plasma optical systemEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
C. Pagano, A. A. Goncharov, and J. G. Lunney Axi-symmetric compression and focusing of a low temperature laser produced copper plasma with an electrostatic plasma optical system was investigated for the first time. The degree of plasma concentration was quantified using Langmuir ion measurements of the ion flow and optical measurements of the ... [Rev. Sci. Instrum. 83, 02B701 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Automatic generation of IGUN input files for enhanced mesh resolution at the plasma meniscusEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Reinard Becker The plasma-beam interface (meniscus) is highly nonlinear and its correct simulation needs a mesh resolution of the order of the Debye length. In high intensity ion sources, the plasma density is usually too high and the Debye length is too small for a sufficient mesh resolution. A well established m ... [Rev. Sci. Instrum. 83, 02B702 (2012)] published Thu Feb 2, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

A new TriBeam system for three-dimensional multimodal materials analysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
McLean P. Echlin, Alessandro Mottura, Christopher J. Torbet, and Tresa M. Pollock The unique capabilities of ultrashort pulse femtosecond lasers have been integrated with a focused ion beam (FIB) platform to create a new system for rapid 3D materials analysis. The femtosecond laser allows for in situ layer-by-layer material ablation with high material removal rates. The high puls ... [Rev. Sci. Instrum. 83, 023701 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Broadband microwave spectroscopy in Corbino geometry at He temperaturesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Katrin Steinberg, Marc Scheffler, and Martin Dressel A broadband microwave spectrometer has been constructed to determine the complex conductivity of thin metal films at frequencies from 45 MHz to 20 GHz working in the temperature range from 0.45 K to 2 K (in a He cryostat). The setup follows the Corbino approach: a vector network analyzer measures th ... [Rev. Sci. Instrum. 83, 024704 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Note: Self-sensing based on charge control improves the performance of active damping using piezoelementsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yong Bin Liu, Lian Sheng Zhang, and Zhi Hua Feng A piezoelectric element can be used separately as a sensor or an actuator. A self-sensing strategy based on a charge driver can utilize a piezoelectric element as a sensor while actuating. The strategy was proven via experiments on a cantilever vibrator using a piezoelectric plate with both sensing ... [Rev. Sci. Instrum. 83, 026103 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Generation of high charge state metal ion beams by electron cyclotron resonance heating of vacuum arc plasma in cusp trapEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. G. Nikolaev, K. P. Savkin, E. M. Oks, A. V. Vizir, G. Yu. Yushkov et al. A method for generating high charge state heavy metal ion beams based on high power microwave heating of vacuum arc plasma confined in a magnetic trap under electron cyclotron resonance conditions has been developed. A feature of the work described here is the use of a cusp magnetic field with inher ... [Rev. Sci. Instrum. 83, 02A309 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Dependence of ion beam current on position of mobile plate tuner in multi-frequencies microwaves electron cyclotron resonance ion sourceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yosuke Kurisu, Ryutaro Kiriyama, Tomoya Takenaka, Dai Nozaki, Fuminobu Sato et al. We are constructing a tandem-type electron cyclotron resonance ion source (ECRIS). The first stage of this can supply 2.45 GHz and 1113 GHz microwaves to plasma chamber individually and simultaneously. We optimize the beam current I by the mobile plate tuner. The I is affected by the position of the ... [Rev. Sci. Instrum. 83, 02A310 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Development of electron beam ion source charge breeder for rare isotopes at Californium Rare Isotope Breeder UpgradeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. Kondrashev, C. Dickerson, A. Levand, P. N. Ostroumov, R. C. Pardo et al. Recently, the Californium Rare Isotope Breeder Upgrade (CARIBU) to the Argonne Tandem Linac Accelerator System (ATLAS) was commissioned and became available for production of rare isotopes. Currently, an electron cyclotron resonance ion source is used as a charge breeder for CARIBU beams. To further ... [Rev. Sci. Instrum. 83, 02A902 (2012)] published Fri Feb 3, 2012. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - February 3, 2012 Category: Physics Source Type: research

Experimental investigation of geodesic acoustic mode spatial structure, intermittency, and interaction with turbulence in the DIII-D tokamakEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Magnetohydrodynamic instabilities in radial foil configurationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Density dependence of capillary plasma on the pressure and applied voltageEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Amended conjecture on an upper bound to time-dependent space-charge limited currentEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Laser heating of finite two-dimensional dust clusters: B. SimulationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Characteristics of an underwater direct current discharge in bubbles and the temperature distribution in the bubblesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Suppression of higher mode excitation in a high gain relativistic klystron amplifierEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Optical field-ionization of a neutral gas with inhomogeneous density for electron acceleration by a high-intensity laserEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Analysis on the exclusiveness of turbulence suppression between static and time-varying shear flowEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Air plasma waveguide using pico-sec and nano-sec laser pulsesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Simulation studies of positron acceleration in a shock wave in a nonuniform external magnetic fieldEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

X-pinch radiography for the radiation suppressed tungsten and aluminum planar wire arrayEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research

Reduced magnetohydrodynamic theory of oblique plasmoid instabilitiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: Physics of Plasmas - February 3, 2012 Category: Physics Source Type: research