Effect of azimuthally asymmetric reactor components on a parallel plate capacitively coupled plasma
Jason A. Kenney, Shahid Rauf, and Ken Collins
A three-dimensional fluid plasma model is used to investigate the impact of azimuthally asymmetric reactor components on spatial characteristics of parallel plate capacitively coupled plasmas. We consider three scenarios: high frequency (13.56 MHz) argon discharges with, separately, an off-axis circ ... [J. Appl. Phys. 106, 103302 (2009)] published Thu Nov 19, 2009.
Arrest of Langmuir wave collapse by quantum effects
G. Simpson, C. Sulem, and P. L. Sulem
The arrest of Langmuir wave collapse by quantum effects, first addressed by Haas and Shukla [Phys. Rev. E 79, 066402 (2009)] using a Rayleigh-Ritz trial function method is revisited, using rigorous estimates and systematic asymptotic expansions. The absence of blow up for the so-called quantum Zakha ... [Phys. Rev. E 80, 056405 (2009)] published Thu Nov 19, 2009.
Inverse bremsstrahlung absorption with nonlinear effects of high laser intensity and non-Maxwellian distribution
Su-Ming Weng, Zheng-Ming Sheng, and Jie Zhang
Inverse bremsstrahlung (IB) absorption and evolution of the electron distribution function (EDF) in a wide laser intensity range (1010 W/cm) have been studied systematically by a two velocity-dimension Fokker-Planck code. It is found that Langdon's IB operator overestimates the absorption rate at h ... [Phys. Rev. E 80, 056406 (2009)] published Thu Nov 19, 2009.
Brownian dynamic of laser cooling and crystallization of electron-ion plasma
A. P. Gavriliuk, I. L. Isaev, S. V. Karpov, I. V. Krasnov, and N. Ya. Shaparev
Laser cooling and crystallization of electron-ion plasma is studied using the Brownian dynamics simulation technique and taking into consideration the interaction of ions with the electron subsystem. It has been shown that the nonlinear dependence of laser friction force on the velocity of ions has ... [Phys. Rev. E 80, 056404 (2009)] published Thu Nov 19, 2009.
Guiding of 35 TW laser pulses in ablative capillary discharge waveguides
C. McGuffey, M. Levin, T. Matsuoka, V. Chvykov, G. Kalintchenko et al.
An ablatively driven capillary discharge plasma waveguide has been used to demonstrate guiding of 30 fs, 35 TW laser pulses over distances up to 3 cm with incident intensity in excess of 4 x 10 W/cm. The plasma density range over which good guiding was observed was 13 x 10 cm. The quality of the l ... [Phys. Plasmas 16, 113105 (2009)] published Thu Nov 19, 2009.
Stochastic analysis of pitch angle scattering of charged particles by transverse magnetic waves
Don S. Lemons, Kaijun Liu, Dan Winske, and S. Peter Gary
This paper describes a theory of the velocity space scattering of charged particles in a static magnetic field composed of a uniform background field and a sum of transverse, circularly polarized, magnetic waves. When that sum has many terms the autocorrelation time required for particle orbits to b ... [Phys. Plasmas 16, 112306 (2009)] published Thu Nov 19, 2009.
Parametric analysis of a magnetized cylindrical plasma
Eduardo Ahedo
The relevant macroscopic model, the spatial structure, and the parametric regimes of a low-pressure plasma confined by a cylinder and an axial magnetic field is discussed for the small-Debye length limit, making use of asymptotic techniques. The plasma response is fully characterized by three-dimens ... [Phys. Plasmas 16, 113503 (2009)] published Thu Nov 19, 2009.
Dressed soliton in quantum dusty pair-ion plasma
Prasanta Chatterjee, Kaushik Roy, S. V. Muniandy, and C. S. Wong
Nonlinear propagation of a quantum ion-acoustic dressed soliton is studied in a dusty pair-ion plasma. The Kortewegde Vries (KdV) equation is derived using reductive perturbation technique. A higher order inhomogeneous differential equation is obtained for the higher order correction. The expression ... [Phys. Plasmas 16, 112106 (2009)] published Thu Nov 19, 2009.
Measurements of the Critical Power for Self-Injection of Electrons in a Laser Wakefield Accelerator
D. H. Froula, C. E. Clayton, T. Doppner, K. A. Marsh, C. P. J. Barty et al.
A laser wakefield acceleration study has been performed in the matched, self-guided, blowout regime producing 72050 MeV quasimonoenergetic electrons with a divergence Deltatheta of 2.850.15 mrad using a 10 J, 60 fs 0.8 [mu]m laser. While maintaining a nearly constant plasma density (3 x 10 cm), ... [Phys. Rev. Lett. 103, 215006 (2009)] published Thu Nov 19, 2009.
Generating Quasi-Single-Cycle Relativistic Laser Pulses by Laser-Foil Interaction
L. L. Ji (吉亮亮), B. F. Shen (沈百飞), X. M. Zhang (张晓梅), F. C. Wang (王凤超), Z. Y. Jin (金张英) et al.
A scheme for producing nearly single-cycle relativistic laser pulses is proposed. When a laser pulse interacts with an overdense thin foil, because of self-consistent nonlinear modulation, the latter will be more transparent to the more intense part of the laser, so that a transmitted pulse can be m ... [Phys. Rev. Lett. 103, 215005 (2009)] published Thu Nov 19, 2009.
Fitting the dielectric response of collisionless plasmas by continued fractions
August Wierling
An approximation scheme for the dielectric response of thermal collisionless plasmas at arbitrary degeneracy is presented. A T-fraction representation is obtained from the known expansions of the real part of the dielectric function for small and large arguments. The partial numerators and denominat ... [Phys. Plasmas 16, 112105 (2009)] published Wed Nov 18, 2009.
Dust charging effects on test charge potential in a multi-ion dusty plasma
S. Ali
The DebyeHuckel and oscillatory wake potentials caused by a test charge are studied in a multi-ion dusty plasma, whose constituents are the Boltzmann distributed electrons and light positive ions, the heavy mobile negative ions, and static but charge fluctuating dust particles. For this purpose, flu ... [Phys. Plasmas 16, 113706 (2009)] published Wed Nov 18, 2009.
Dust charge and ion drag forces in a high-voltage, capacitive radio frequency sheath
I. Denysenko, K. Ostrikov, and N. A. Azarenkov
The charge of an isolated dust grain and ion drag forces on the grain in a collisionless, high-voltage, capacitive rf sheath are studied theoretically. The studies are carried out assuming that the positive ions are monoenergetic, as well as in more realistic approximation, assuming that the time-av ... [Phys. Plasmas 16, 113707 (2009)] published Wed Nov 18, 2009.
Effects of trapped electrons on electromagnetic fields in an oblique shock wave
Mieko Toida and Kenta Shikii
A magnetosonic shock wave propagating obliquely to an external magnetic field can trap electrons and accelerate them to ultrarelativistic energies. The effect of trapped electrons on electromagnetic fields in a shock wave is studied by theory and particle simulations. The expressions for field stren ... [Phys. Plasmas 16, 112305 (2009)] published Wed Nov 18, 2009.
Current driven instability in collisional dusty plasmas
B. P. Pandey, S. V. Vladimirov, and A. Samarian
The current driven electromagnetic instability in a collisional, magnetized, dusty medium is considered in the present work. It is shown that in the presence of the magnetic field aligned current, the low-frequency waves in the medium can become unstable if the ratio of the current to the ambient fi ... [Phys. Plasmas 16, 113708 (2009)] published Wed Nov 18, 2009.
Long-distance correlation and zonal flow structures induced by mean E x B shear flows in the biasing H-mode at TEXTOR
Y. Xu, S. Jachmich, R. R. Weynants, M. Van Schoor, M. Vergote et al.
Long-distance toroidal correlations of potential and density fluctuations have been investigated at the TEXTOR tokamak [H. Soltwisch et al., Plasma Phys. Controlled Fusion 26, 23 (1984)] in edge electrode-biasing experiments. During the biasing-induced H-mode, the dc E x B shear flow triggers a zona ... [Phys. Plasmas 16, 110704 (2009)] published Wed Nov 18, 2009.
Design, construction, and calibration of a three-axis, high-frequency magnetic probe (B-dot probe) as a diagnostic for exploding plasmas
E. T. Everson, P. Pribyl, C. G. Constantin, A. Zylstra, D. Schaeffer et al.
A three-axis, 2.5 mm overall diameter differential magnetic probe (also known as B-dot probe) is discussed in detail from its design and construction to its calibration and use as diagnostic of fast transient effects in exploding plasmas. A design and construction method is presented as a means to r ... [Rev. Sci. Instrum. 80, 113505 (2009)] published Wed Nov 18, 2009.
Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas
O. V. Gotchev, P. Y. Chang, J. P. Knauer, D. D. Meyerhofer, O. Polomarov et al.
The demonstration of magnetic field compression to many tens of megagauss in cylindrical implosions of inertial confinement fusion targets is reported for the first time. The OMEGA laser [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] was used to implode cylindrical CH targets filled with deuter ... [Phys. Rev. Lett. 103, 215004 (2009)] published Wed Nov 18, 2009.
Characteristics of Light Reflected from a Dense Ionization Wave with a Tunable Velocity
A. Zhidkov, T. Esirkepov, T. Fujii, K. Nemoto, J. Koga et al.
An optically dense ionization wave (IW) produced by two femtosecond (~10/30 fs) laser pulses focused cylindrically and crossing each other may become an efficient coherent x-ray converter in accordance with the Semenova-Lampe theory. The resulting velocity of a quasiplane IW in the vicinity of puls ... [Phys. Rev. Lett. 103, 215003 (2009)] published Wed Nov 18, 2009.
Spectroscopic investigation of wave driven microwave plasmas
R. Wijtvliet, E. Felizardo, E. Tatarova, F. M. Dias, C. M. Ferreira et al.
Large H atom line broadening was found throughout the volume of surface wave generated HeH and H microwave plasmas at low pressures. The measured Doppler temperatures corresponding to the H, H, H, H, and H line profiles were found to be higher than the rotational temperature of the hydrogen molecula ... [J. Appl. Phys. 106, 103301 (2009)] published Tue Nov 17, 2009.
First Direct Measurement of Optical Phonons in 2D Plasma Crystals
L. Couedel, V. Nosenko, S. K. Zhdanov, A. V. Ivlev, H. M. Thomas et al.
Spectra of phonons with out-of-plane polarization were studied experimentally in a 2D plasma crystal. The dispersion relation was directly measured for the first time using a novel method of particle imaging. The out-of-plane mode was proven to have negative optical dispersion at small wave numbers, ... [Phys. Rev. Lett. 103, 215001 (2009)] published Tue Nov 17, 2009.
Neutron yield study of direct-drive, low-adiabat cryogenic D implosions on OMEGA laser system
S. X. Hu, P. B. Radha, J. A. Marozas, R. Betti, T. J. B. Collins et al.
Neutron yields of direct-drive, low-adiabat (alpha[approximate]2 to 3) cryogenic D target implosions on the OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] have been systematically investigated using the two-dimensional (2D) radiation hydrodynamics code DRACO [P. B. Radha et a ... [Phys. Plasmas 16, 112706 (2009)] published Mon Nov 16, 2009.
Relaxation of spheromak configurations with open flux
Pablo Luis Garcia-Martinez and Ricardo Farengo
The relaxation of several kink unstable equilibria with open flux representative of spheromaks sustained by dc helicity injection is studied by means of three-dimensional, resistive magnetohydrodynamic simulations. No external driving is applied, but the initial conditions are chosen to reproduce th ... [Phys. Plasmas 16, 112508 (2009)] published Mon Nov 16, 2009.
Comparison between experiment and simulation for argon inductively coupled plasma
Fei Gao, Shu-Xia Zhao, Xiao-Song Li, and You-Nian Wang
In order to include the nonlocal characteristics of electrons and investigate the inductively coupled plasma (ICP) resources more completely, we have developed a hybrid Monte Carlo (MC)/fluid hybrid model and calculated the axial and radial distributions of electron density, electron temperature, pl ... [Phys. Plasmas 16, 113502 (2009)] published Mon Nov 16, 2009.
Current sheet bifurcation and collapse in electron magnetohydrodynamics
A. Zocco, L. Chacon, and Andrei N. Simakov
Inertial effects in nonlinear magnetic reconnection are studied within the context of two-dimensional electron magnetohydrodynamics with resistive and viscous dissipation. Families of nonlinear solutions for relevant current sheet parameters are predicted and confirmed numerically in all regimes of ... [Phys. Plasmas 16, 110703 (2009)] published Mon Nov 16, 2009.
Observation of a Helical Self-Organized State in a Compact Toroidal Plasma
C. D. Cothran, M. R. Brown, T. Gray, M. J. Schaffer, and G. Marklin
A nonaxisymmetric stable magnetohydrodynamic (MHD) equilibrium within a prolate cylindrical conducting boundary has been produced experimentally. It has m=1 azimuthal symmetry, helical distortion, and flat lambda profile, all in agreement with the computed magnetically relaxed minimum magnetic energ ... [Phys. Rev. Lett. 103, 215002 (2009)] published Mon Nov 16, 2009.
Composite self-similar solutions for relativistic shocks: The transition to cold fluid temperatures
Margaret Pan and Re'em Sari
The flow resulting from a strong ultrarelativistic shock moving through a stellar envelope with a polytropelike density profile has been studied analytically and numerically at early times while the fluid temperature is relativisticthat is, just before and after the shock breaks out of the star. Suc ... [Phys. Fluids 21, 116101 (2009)] published Fri Nov 13, 2009.
Nonthermal effects on the KarpmanWashimi ponderomotive magnetization in Lorentzian plasmas
Hwa-Min Kim and Young-Dae Jung
The nonthermal effects on the KarpmanWashimi ponderomotive magnetization are investigated in Lorentzian plasmas. The induced magnetization due to the nonstationary ponderomotive interaction related to the time variation of the field intensity is obtained as a function of the Debye length and spectra ... [Phys. Plasmas 16, 114504 (2009)] published Fri Nov 13, 2009.
Arbitrary amplitude dust ion-acoustic shock waves in a dusty plasma with positive and negative ions
A. A. Mamun, P. K. Shukla, and B. Eliasson
Arbitrary amplitude dust ion-acoustic shock waves in a multi-ion dusty plasma (composed of electrons, light positive ions, heavy negative ions, and stationary massive dust grains) has been studied. For this purpose, the coupled Poisson and dust-charging equations, which accounts for the fluctuation ... [Phys. Plasmas 16, 114503 (2009)] published Fri Nov 13, 2009.
Wall shocks in high-energy-density shock tube experiments
F. W. Doss, H. F. Robey, R. P. Drake, and C. C. Kuranz
The radiative precursor of a sufficiently fast shock has been observed to drive the vaporization of shock tube material ahead of the shock. The resulting expansion drives a converging blast wave into the gas volume of the tube. The effects of this wall shock may be observed and correlated with prima ... [Phys. Plasmas 16, 112705 (2009)] published Fri Nov 13, 2009.
Effect of the resonant growth of harmonics on the electron density in capacitively coupled plasma
Yohei Yamazawa
The growth of harmonics is known to occur under the condition of plasma series resonance (PSR). In an actual plasma process chamber, the external circuit also affects the PSR. We experimentally demonstrated the resonant growth of the third and fourth harmonics by tuning a variable capacitor attached ... [Appl. Phys. Lett. 95, 191504 (2009)] published Fri Nov 13, 2009.
Purely electrical nature of fireball (FB), its elementary equations, calculated parameters and conditions of FB possible experimental generation. (arXiv:0903.4977v9 [physics.plasm-ph] UPDATED)
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