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Surface sensitivity in scanning transmission x-ray microspectroscopy using secondary electron detectionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
C. Hub, S. Wenzel, J. Raabe, H. Ade, and R. H. Fink The successful integration of electron detection into an existing scanning transmission x-ray microspectroscope (STXM) at the Swiss Light Source is demonstrated. In conventional x-ray detection using a photomultiplier, STXM offers mainly bulk sensitivity combined with high lateral resolution. Howeve ... [Rev. Sci. Instrum. 81, 033704 (2010)] published Fri Mar 19, 2010. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - March 20, 2010 Category: Physics Source Type: journals

An instrument for evaluation of performance of heat dissipative coatingsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Chetan N. Suryawanshi, Taesam Kim, and Chhiu-Tsu Lin An instrument is developed to evaluate the performance of heat dissipative coatings. The instrument has features to measure the apparent emissivity of a given surface under different input power settings. The emissivity of aluminum (Al Q-panel) and copper, as measured from 60135 degrees C, showed a ... [Rev. Sci. Instrum. 81, 035105 (2010)] published Fri Mar 19, 2010. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - March 20, 2010 Category: Physics Source Type: journals

Fast electron energy deposition in a magnetized plasma: Kinetic theory and particle-in-cell simulationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. Robiche, J.-M. Rax, G. Bonnaud, and L. Gremillet The collisional dynamics of a relativistic electron jet in a magnetized plasma are investigated within the framework of kinetic theory. The relativistic FokkerPlanck equation describing slowing down, pitch angle scattering, and cyclotron rotation is derived and solved. Based on the solution of this ... [Phys. Plasmas 17, 033106 (2010)] published Fri Mar 19, 2010. (Source: Physics of Plasmas)
Source: Physics of Plasmas - March 20, 2010 Category: Physics Source Type: journals

Oblique incidence scattering from single-walled carbon nanotubesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Afshin Moradi A theory of electromagnetic wave scattering by metallic single-walled carbon nanotubes at oblique incidence is provided using modal techniques. Electronic excitations on the nanotube's surface are modeled by an infinitesimally thin layer of free-electron gas described previously by means of the line ... [Phys. Plasmas 17, 033504 (2010)] published Fri Mar 19, 2010. (Source: Physics of Plasmas)
Source: Physics of Plasmas - March 20, 2010 Category: Physics Source Type: journals

Effect of rolling friction on binary collisions of spheresEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Andres D. Orlando and Hayley H. Shen Foerster et al. [Phys. Fluids 6, 1108 (1994)] proposed a binary collision model for spheres and a way to measure the constant impact parameters in the model. These three parameters were necessary to describe the translational momentum exchange during a collision. An extensive data set for a variety ... [Phys. Fluids 22, 033304 (2010)] published Fri Mar 19, 2010. (Source: Physics of Fluids)
Source: Physics of Fluids - March 20, 2010 Category: Physics Source Type: journals

Energy dissipation and resolution of steep gradients in one-dimensional Burgers flowsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Chuong V. Tran and David G. Dritschel Traveling-wave solutions of the inviscid Burgers equation having smooth initial wave profiles of suitable shapes are known to develop shocks (infinite gradients) in finite times. Such singular solutions are characterized by energy spectra that scale with the wave number k as k. In the presence of vi ... [Phys. Fluids 22, 037102 (2010)] published Fri Mar 19, 2010. (Source: Physics of Fluids)
Source: Physics of Fluids - March 20, 2010 Category: Physics Source Type: journals

Observation of earlier two-to-three dimensional structural transition in gold cluster anions by isoelectronic substitution: MAu (n=811; M=Ag,Cu)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Lei-Ming Wang, Rhitankar Pal, Wei Huang, Xiao Cheng Zeng, and Lai-Sheng Wang The effects of isoelectronic substitution on the electronic and structural properties of gold clusters are investigated in the critical size range of the two-dimensional (2D)-three-dimensional (3D) structural transition (MAu, n=811; M=Ag,Cu) using photoelectron spectroscopy and density functional ... [J. Chem. Phys. 132, 114306 (2010)] published Fri Mar 19, 2010. (Source: Journal of Chemical Physics)
Source: Journal of Chemical Physics - March 20, 2010 Category: Physics Source Type: journals

Liquid-vapor equilibria and interfacial properties of n-alkanes and perfluoroalkanes by molecular simulationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Miguel A. Amat and Gregory C. Rutledge A molecular dynamics study is presented to assess the performance of a united-atom model in the prediction of liquid-vapor interfacial properties for short-chain perfluoroalkanes and their alkane counterparts. In particular, the ability of this model to discriminate between the surface-energy values ... [J. Chem. Phys. 132, 114704 (2010)] published Fri Mar 19, 2010. (Source: Journal of Chemical Physics)
Source: Journal of Chemical Physics - March 20, 2010 Category: Physics Source Type: journals

Laser induced fluorescence spectroscopy of the jet-cooled carbon dioxide cation (CO and CO)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Mohammed A. Gharaibeh and Dennis J. Clouthier The A-tilde Pi-X-tilde Pi band systems of jet-cooled CO and CO have been recorded by laser-induced fluorescence (LIF) techniques. Very intense, vibrationally cold expansions of these cations have been obtained using a pulsed electric discharge jet with a precursor mixture of carbon dioxide or C la ... [J. Chem. Phys. 132, 114307 (2010)] published Fri Mar 19, 2010. (Source: Journal of Chemical Physics)
Source: Journal of Chemical Physics - March 20, 2010 Category: Physics Source Type: journals

Far infrared spectra of solid state aliphatic amino acids in different protonation statesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Aurelien Trivella, Thomas Gaillard, Roland H. Stote, and Petra Hellwig Far infrared spectra of zwitterionic, cationic, and anionic forms of aliphatic amino acids in solid state have been studied experimentally. Measurements were done on glycine, L-alanine, L-valine, L-leucine, and L-isoleucine powder samples and film samples obtained from dried solutions prepared at pH ... [J. Chem. Phys. 132, 115105 (2010)] published Fri Mar 19, 2010. (Source: Journal of Chemical Physics)
Source: Journal of Chemical Physics - March 20, 2010 Category: Physics Source Type: journals

Electronically excited and ionized states of the CHCHOH radical: A theoretical studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
B. Karpichev, L. Koziol, K. Diri, H. Reisler, and A. I. Krylov The low lying excited electronic states of the 2-hydroxyethyl radical, CHCHOH, have been investigated theoretically in the range 57 eV by using coupled-cluster and equation-of-motion coupled-cluster methods. Both dissociation and isomerization pathways are identified. On the ground electronic potent ... [J. Chem. Phys. 132, 114308 (2010)] published Fri Mar 19, 2010. (Source: Journal of Chemical Physics)
Source: Journal of Chemical Physics - March 20, 2010 Category: Physics Source Type: journals

Quantum noise in a terahertz hot electron bolometer mixerEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
W. Zhang, P. Khosropanah, J. R. Gao, E. L. Kollberg, K. S. Yngvesson et al. We have measured the noise temperature of a single, sensitive superconducting NbN hot electron bolometer (HEB) mixer in a frequency range from 1.6 to 5.3 THz, using a setup with all the key components in vacuum. By analyzing the measured receiver noise temperature using a quantum noise (QN) model fo ... [Appl. Phys. Lett. 96, 111113 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Correlated d ferromagnetism and photoluminescence in undoped ZnO nanowiresEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report the correlated d ferromagnetism and photoluminescence in undoped single-crystalline ZnO nanowires synthesized by using a vapor transport method. We systematically tune the oxygen deficiency in the ZnO nanowires from 4% to 20% by adjusting the growth conditions, i.e., selecting different ca ... [Appl. Phys. Lett. 96, 112511 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Measuring the temperature of a mesoscopic electron system by means of single electron statisticsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Enrico Prati, Matteo Belli, Marco Fanciulli, and Giorgio Ferrari We measure the temperature of a mesoscopic system consisting of an ultradilute two-dimensional electron gas at the Si/SiO interface in a metal-oxide-semiconductor field effect transistor (MOSFET) by means of the capture and emission of an electron in a point defect close to the interface. We show th ... [Appl. Phys. Lett. 96, 113109 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Response to Comment on `Enhanced spin injection and voltage bias in (Zn,Co)O/MgO/(Zn,Co)O magnetic tunnel junctions' [Appl. Phys. Lett. 96, 116101 (2010)]Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
G. Chen, F. Zeng, and F. Pan Abstract not available. [Appl. Phys. Lett. 96, 116102 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Space-charge-limited current in organic light emitting diodesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Fabrizio Torricelli, Dario Zappa, and Luigi Colalongo A physically based mathematical model for the dc current of single-carrier organic light emitting diodes is presented. The model accounts for the most important physical quantities that influence the carrier mobility and thus the device current itself: temperature, charge carrier concentration, and ... [Appl. Phys. Lett. 96, 113304 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Confinement effects of CdSe nanocrystals intercalated into mesoporous silicaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Shu-Fang Chen, Chuan-Pu Liu, Andrei A. Eliseev, Dmitry I. Petukhov, and Sandip Dhara CdSe nanocrystals are intercalated into ordered hexagonal arrays of mesoporous silica. The nanocrystals are clearly confined in the channels and their size was estimated to be consistent with the pore size. Transmission electron microscopy suggests that CdSe nanocrystals have a spherical morphology ... [Appl. Phys. Lett. 96, 111907 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Application of thermal lens response to monitor health status of red blood cells: A quantitative study of the cell death process by extracting thermal diffusivity and sizeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Srivathsan Vasudevan, George Chung Kit Chen, and Marta Andika We explore monitoring the death process of individual red blood cells (RBC) quantitatively by using thermal lens (TL) response. TL response is a noninvasive excitation/probe technique that reflects photothermal parameters (e.g., absorption, thermal diffusivity, size, etc.). Since these parameters of ... [Appl. Phys. Lett. 96, 113703 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Comment on Enhanced spin injection and voltage bias in (Zn,Co)O/MgO/(Zn,Co)O magnetic tunnel junctions [Appl. Phys. Lett. 95, 232508 (2009)]Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Gerhard Jakob Abstract not available. [Appl. Phys. Lett. 96, 116101 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Minimizing the scattering of a nonmagnetic cloakEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Jingjing Zhang, Yu Luo, and Niels Asger Mortensen Nonmagnetic cloak offers a feasible way to achieve invisibility at optical frequencies using materials with only electric responses. In this letter, we suggest an approximation of the ideal nonmagnetic cloak and quantitatively study its electromagnetic characteristics using a full-wave scattering th ... [Appl. Phys. Lett. 96, 113511 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Compact and low crosstalk waveguide crossing using impedance matched metamaterialEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Weiqiang Ding, Donghua Tang, Yan Liu, Lixue Chen, and Xiudong Sun A waveguide crossing mechanism based on metamaterial is proposed and numerically investigated using finite difference in time domain method. The waveguide cross is filled with impedance matched metamaterial, which has a large absolute value of refractive index, and effectively suppresses the diffrac ... [Appl. Phys. Lett. 96, 111114 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

AlGaAs/GaAs single electron transistor fabricated without modulation dopingEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. M. See, O. Klochan, A. R. Hamilton, A. P. Micolich, M. Aagesen et al. We have fabricated a quantum dot single electron transistor, based on AlGaAs/GaAs heterojunction without modulation doping, which exhibits clear and stable Coulomb blockade oscillations. The temperature dependence of the Coulomb blockade peak line shape is well described by standard Coulomb blockade ... [Appl. Phys. Lett. 96, 112104 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Flexible picene thin film field-effect transistors with parylene gate dielectric and their physical propertiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Naoko Kawasaki, Wolfgang L. Kalb, Thomas Mathis, Yumiko Kaji, Ryoji Mitsuhashi et al. Flexible picene thin film field-effect transistors (FETs) have been fabricated with parylene gate dielectric on polyethylene terephthalate substrates. The picene thin film FETs show p-channel output/transfer characteristics and the field-effect mobility [mu] reaches ~1 cm V s in vacuum. The FET sho ... [Appl. Phys. Lett. 96, 113305 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Real-time atomic force microscopy imaging of photoinduced surface deformation in AsSe chalcogenide filmsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present direct measurements of the kinetics of surface relief gratings (SRGs) formation in amorphous AsSe (20 (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Energy-harvesting device with mechanical frequency-up conversion mechanism for increased power efficiency and wideband operationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Seok-Min Jung and Kwang-Seok Yun In this paper, we propose an energy-harvesting device that uses snap-through buckling for mechanical frequency-up conversion. The proposed device consists of buckled slender bridges with a proof mass and cantilever beams attached on them. When subjected to a low-frequency vibration above the thresho ... [Appl. Phys. Lett. 96, 111906 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Long range surface polaritons supported by lossy thin filmsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Christophe Arnold, Yichen Zhang, and Jaime Gomez Rivas We demonstrate experimentally that strongly absorbing chalcogenide thin films can support long range surface polaritons. Moreover, the possibility to change the phase of this material allows us to investigate the influence of the permittivity of the thin film on the surface modes. We demonstrate the ... [Appl. Phys. Lett. 96, 113108 (2010)] published Fri Mar 19, 2010. (Source: Applied Physics Letters)
Source: Applied Physics Letters - March 20, 2010 Category: Physics Source Type: journals

Bipolar optical forces on dielectric and metallic nanoparticles by evanescent waveEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We numerically show that both repulsive and attractive (bipolar) optical forces can be exerted on a dielectric or metallic cylindrical nanoparticle by a totally internal refracted wave. This requires that the particles possesses either a whispering gallery (WG) resonance or a localized surface ... (Source: Optics Letters)
Source: Optics Letters - March 20, 2010 Category: Physics Authors: J. J. XiaoH. H. ZhengY. X. SunY. Yao Source Type: journals

Microjoule-energy, 1 MHz repetition rate pulses from all-fiber-integrated nonlinear chirped-pulse amplifierEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We demonstrate generation of pulses with up to 4 μJ energy at 1 MHz repetition rate through nonlinear chirped-pulse amplification in an entirely fiber-integrated amplifier, seeded by a fiber oscillator. The peak power and the estimated nonlinear phase shift of the amplified pulses are as much ... (Source: Optics Letters)
Source: Optics Letters - March 20, 2010 Category: Physics Authors: H. KalayciogluB. OktemÇ. ŞenelP. P. PaltaniF. Ö. Ilday Source Type: journals

Nd:glass regenerative amplifier with increased bandwidth and high output energy for chirped pulse amplification systemsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We demonstrate a large energy output and a wider output spectral bandwidth from Nd:glass-based regenerative amplifiers. The maximum energy extracted from the regenerative amplifier is 24 mJ with an overall gain of 3.4×10^8. The maximum output bandwidth achieved is 4.2 nm FWHM when the input ... (Source: Applied Optics)
Source: Applied Optics - March 20, 2010 Category: Physics Authors: Paramita DebKailash C. GuptaJayant Fuloria Source Type: journals

Biophotonic in situ sensor for plant leavesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Knowledge of the water concentration of plants can be helpful in several environmental and agricultural domains. There are many methods for the determination of water content in plant leaves; however, most of them give a relative moisture level or an analytical measure after a previous calibration ... (Source: Applied Optics)
Source: Applied Optics - March 20, 2010 Category: Physics Authors: Elian ConejoJean-Pierre FrangiGilles de Rosny Source Type: journals

Long rectangle resonator 1550 nm AlGaInAs/InP lasersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
1550 nm AlGaInAs/InP long rectangle resonator lasers with three sides surrounded by SiO_2 and p electrode layers are fabricated by planar technology, and room-temperature continuous-wave lasing is realized for a laser with a length of 53 μm and a width of 2 μm. Multiple peaks with ... (Source: Journal of the Optical Society of America B)
Source: Journal of the Optical Society of America B - March 20, 2010 Category: Physics Authors: Shi-Jiang WangYong-Zhen HuangYue-De YangJian-Dong LinKai-Jun CheJin-Long XiaoYun Du Source Type: journals

Angular splitting in half Kapitza-Dirac effect of H_2^+ moleculesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The half Kapitza-Dirac effect following photoionization of molecules in intense standing-wave laser fields is studied. Photoelectron angular distributions (PADs) of molecules split towards the laser propagation and exhibit multiple splitting, which manifests the integer property of the ... (Source: Journal of the Optical Society of America B)
Source: Journal of the Optical Society of America B - March 20, 2010 Category: Physics Authors: Xianghe RenJingtao ZhangZhizhan XuD.-S. Guo Source Type: journals

Bar-like S-cone stimuli reveal the importance of an intermediate temporal filterEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The relative involvement of different temporal frequency-selective filters underlying detection of chromatic stimuli was studied. Diverse spectral stimuli were used, namely flashed blue and yellow light spots, wide bars, and narrow bars. The stimuli were temporally modulated in luminance having ... (Source: Journal of the Optical Society of America A)
Source: Journal of the Optical Society of America A - March 20, 2010 Category: Physics Authors: Rigmor C. BaraasJanus J. KulikowskiMark R. Muldoon Source Type: journals

Application of Riesz transforms to the isotropic AM-PM decomposition of geometrical-optical illusion imagesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The existence of a special second-order mechanism in the human visual system, able to demodulate the envelope of visual stimuli, suggests that spatial information contained in the image envelope may be perceptually relevant. The Riesz transform, a natural isotropic extension of the Hilbert ... (Source: Journal of the Optical Society of America A)
Source: Journal of the Optical Society of America A - March 20, 2010 Category: Physics Authors: Vicente Sierra-Vázquez Ignacio Serrano-Pedraza Source Type: journals

3D invisibility cloak unveiledEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Researchers hide a tiny bump from near-infrared light (Source: PhysicsWeb News)
Source: PhysicsWeb News - March 20, 2010 Category: Physics Source Type: news

In vivo pink-beam imaging and fast alignment procedure for rat brain lesion microbeam radiation therapyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A fast 50 µm-accuracy alignment procedure has been developed for the radiosurgery of brain lesions in rats, using microbeam radiation therapy. In vivo imaging was performed using the pink beam (35–60 keV) produced by the ID17 wiggler at the ESRF opened at 120 mm and filtered. A graphical user interface has been developed in order to define the irradiation field size and to position the target with respect to the skull structures observed in X-ray images. The method proposed here allows tremendous time saving by skipping the swap from white beam to monochromatic beam and vice versa. To validate the concept, the som...
Source: Journal of Synchrotron Radiation - March 20, 2010 Category: Physics Authors: Serduc, R.Berruyer, G.Brochard, T.Renier, M.Nemoz, C. Tags: synchrotron microbeam radiation therapy pink-beam imaging alignment procedure preclinical brain radiosurgery research papers Source Type: journals

Simultaneous XAFS measurements of multiple samplesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A four-channel ionization chamber has been designed, constructed and tested. This ionization chamber allows X-ray absorption spectra to be collected in transmission from up to four samples simultaneously. This results in spectra that are free of systematic uncertainty in relative energy alignment introduced by scan-to-scan stability of the monochromator or of numerical uncertainty associated with a post-processing alignment algorithm, allowing, in a single shot, an absolute measure of edge shift between four samples of different valence. As four samples can be measured in parallel, the time expended over the course of an e...
Source: Journal of Synchrotron Radiation - March 20, 2010 Category: Physics Authors: Ravel, B.Scorzato, C.Siddons, D.P.Kelly, S.D.Bare, S.R. Tags: XAFS ionization chamber in situ catalysis research papers Source Type: journals

X-ray magnetic circular dichroism measurements using an X-ray phase retarder on the BM25 A-SpLine beamline at the ESRFEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Circularly polarized X-rays produced by a diamond X-ray phase retarder of thickness 0.5 mm in the Laue transmission configuration have been used for recording X-ray magnetic circular dichroism (XMCD) on the bending-magnet beamline BM25A (SpLine) at the ESRF. Field reversal and helicity reversal techniques have been used to carry out the measurements. The performance of the experimental set-up has been demonstrated by recording XMCD in the energy range from 7 to 11 keV. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - March 20, 2010 Category: Physics Authors: Boada, R.Laguna-Marco, M.Á.Gallastegui, J.A.Castro, G.R.Chaboy, J. Tags: X-ray magnetic circular dichroism X-ray phase retarder polarization tunability magnetic polarization research papers Source Type: journals

Kinoform optics applied to X-ray photon correlation spectroscopyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Moderate-demagnification higher-order silicon kinoform focusing lenses have been fabricated to facilitate small-angle X-ray photon correlation spectroscopy (XPCS) experiments. The geometric properties of such lenses, their focusing performance and their applicability for XPCS measurements are described. It is concluded that one-dimensional vertical X-ray focusing via silicon kinoform lenses significantly increases the usable coherent flux from third-generation storage-ring light sources for small-angle XPCS experiments. (Source: Journal of Synchrotron Radiation)
Source: Journal of Synchrotron Radiation - March 20, 2010 Category: Physics Authors: Sandy, A.R.Narayanan, S.Sprung, M.Su, J.-D.Evans-Lutterodt, K.Isakovic, A.F.Stein, A. Tags: focusing hard X-rays kinoform refractive optics X-ray photon correlation spectroscopy (XPCS) X-ray intensity fluctuation spectroscopy (XIFS) X-ray speckle research papers Source Type: journals

House Appropriators Question DOE's Energy R&D ProgramsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Science Policy News - FYI - The American Institute of Physics)
Source: Science Policy News - FYI - The American Institute of Physics - March 19, 2010 Category: Physics Source Type: organizations

Useful technique for analysis and control of the acceleration beam phase in the azimuthally varying field cyclotronEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Satoshi Kurashima, Takahiro Yuyama, Nobumasa Miyawaki, Hirotsugu Kashiwagi, Susumu Okumura et al. We have developed a new technique for analysis and control of the acceleration beam phase in the cyclotron. In this technique, the beam current pattern at a fixed radius r is measured by slightly scanning the acceleration frequency in the cyclotron. The acceleration beam phase is obtained by analyzi ... [Rev. Sci. Instrum. 81, 033306 (2010)] published Thu Mar 18, 2010. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - March 19, 2010 Category: Physics Source Type: journals

Note: The effect of sample insulation on experiment precision of resistivity measurement in a diamond anvil cellEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Gang Peng (彭刚), Yonghao Han (韩永昊), Chunxiao Gao (高春晓), Yanzhang Ma (马艳章), Baojia Wu (吴宝嘉) et al. By use of electrical field analysis method, the accuracy of electrical resistivity measurement with the van der Pauw method in a diamond anvil cell (DAC) was investigated for the situation that sample and gasket were electrically shorted. It is revealed that metal gasket could not be used in electri ... [Rev. Sci. Instrum. 81, 036108 (2010)] published Thu Mar 18, 2010. (Source: Review of Scientific Instruments)
Source: Review of Scientific Instruments - March 19, 2010 Category: Physics Source Type: journals

Role of the geodesic acoustic mode shearing feedback loop in transport bifurcations and turbulence spreadingEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
K. Miki and P. H. Diamond A theory of the effect of the geodesic acoustic mode (GAM) on turbulence is presented. Two synergistic issues are elucidated: namely, the physics of the zonal flow modulation and its role in the L-H transition, and the role of the GAM wave group propagation in turbulence spreading. Using a wavekinet ... [Phys. Plasmas 17, 032309 (2010)] published Thu Mar 18, 2010. (Source: Physics of Plasmas)
Source: Physics of Plasmas - March 19, 2010 Category: Physics Source Type: journals

Magnetohydrodynamic counter-rotating vortices and synergetic stabilizing effects of magnetic field and plasma flowEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
G. N. Throumoulopoulos and H. Tasso A nonlinear two-dimensional steady state solution in the framework of hydrodynamics describing a row of periodic counter-rotating vortices is extended to the magnetohydrodynamic (MHD) equilibrium equation with incompressible flow of arbitrary direction. The extended solution covers a variety of equi ... [Phys. Plasmas 17, 032508 (2010)] published Thu Mar 18, 2010. (Source: Physics of Plasmas)
Source: Physics of Plasmas - March 19, 2010 Category: Physics Source Type: journals

Power balance and wall erosion measurements in a helicon plasmaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
D. F. Berisford, Roger D. Bengtson, and Laxminarayan L. Raja The power balance measurements in a 1 kW argon helicon plasma discharge are demonstrated. The quantitative wall heat flux measurements using nonintrusive infrared imaging of the glass tube surface, along with data from bolometric probes and calibrated photodiodes to measure heat flux from the rest o ... [Phys. Plasmas 17, 033503 (2010)] published Thu Mar 18, 2010. (Source: Physics of Plasmas)
Source: Physics of Plasmas - March 19, 2010 Category: Physics Source Type: journals

Local instabilities of flow in a flexible channel: Asymmetric flutter driven by a weak critical layerEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Peter S. Stewart, Sarah L. Waters, and Oliver E. Jensen We examine the linear stability of two-dimensional Poiseuille flow in a long channel confined by a rigid wall and a massless damped-tensioned membrane. We seek solutions that are periodic in the streamwise spatial direction and time, solving the homogeneous eigenvalue problem using a Chebyshev spect ... [Phys. Fluids 22, 031902 (2010)] published Thu Mar 18, 2010. (Source: Physics of Fluids)
Source: Physics of Fluids - March 19, 2010 Category: Physics Source Type: journals

Numerical prediction of the film thickening due to surfactants in the LandauLevich problemEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Diego M. Campana, Sebastian Ubal, Maria D. Giavedoni, and Fernando A. Saita In this work numerical solutions of the dip coating problem in the presence of a soluble surfactant are shown. Predictions of film thickening as well as thickening factors are in very good agreement with published experimental data, showing that pure hydrodynamic modeling suffices to mimic the proce ... [Phys. Fluids 22, 032103 (2010)] published Thu Mar 18, 2010. (Source: Physics of Fluids)
Source: Physics of Fluids - March 19, 2010 Category: Physics Source Type: journals

Selective control of PoiseuilleRayleighBenard instabilities by a spanwise magnetic fieldEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
W. Fakhfakh, S. Kaddeche, D. Henry, and H. Ben Hadid The stability of a pressure driven flow in an electrically conducting fluid heated from below and subjected to a spanwise constant magnetic field is investigated through a linear stability analysis. The numerical calculations show that such a magnetic field only affects the longitudinal stationary m ... [Phys. Fluids 22, 034103 (2010)] published Thu Mar 18, 2010. (Source: Physics of Fluids)
Source: Physics of Fluids - March 19, 2010 Category: Physics Source Type: journals

Bounds on diatomic molecules in a relativistic modelEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Natalie Gilka We consider diatomic systems in which the kinetic energy of the electrons is treated in a simple relativistic model. The BornOppenheimer approximation is assumed. We investigate questions of stability, deducing bounds on the number N of electrons, the binding energy DeltaE, and the equilibrium bond ... [J. Math. Phys. 51, 032303 (2010)] published Thu Mar 18, 2010. (Source: Journal of Mathematical Physics)
Source: Journal of Mathematical Physics - March 19, 2010 Category: Physics Source Type: journals

Statistical mechanics of two hard spheres in a spherical pore, exact analytic results in D dimensionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Ignacio Urrutia and Leszek Szybisz This work is devoted to the exact statistical mechanics treatment of simple inhomogeneous few-body systems. The system of two hard spheres (HSs) confined in a hard spherical pore is systematically analyzed in terms of its dimensionality D. The canonical partition function and the one- and two-body d ... [J. Math. Phys. 51, 033303 (2010)] published Thu Mar 18, 2010. (Source: Journal of Mathematical Physics)
Source: Journal of Mathematical Physics - March 19, 2010 Category: Physics Source Type: journals