Gregarius » Physics of Plasmas Articles from ARTICLES

Physics of Plasmas Articles from ARTICLES (8 unread)

Global gyrokinetic particle simulation of toroidal Alfvén eigenmodes excited by antenna and fast ions

Posted: February 21st, 2012, 11:00pm MST

Wenlu Zhang, Ihor Holod, and Zhihong Lin et al.
Linear properties of toroidal Alfvén eigenmode (TAE) is studied in global gyrokinetic particle simulations using both fast ion and antenna excitations. A synthetic antenna provides a precise measurement of the Alfvén continuum gap width and the TAE eigenmode frequency, damping rate, and mode struc ... [Phys. Plasmas 19, 022507 (2012)] published Wed Feb 22, 2012.
Symmetric and asymmetric equilibria with non-parallel flows

Posted: February 21st, 2012, 11:00pm MST

Ap Kuiroukidis and G. N. Throumoulopoulos
Several classes of analytic solutions to a generalized Grad-Shafranov equation with incompressible plasma flow non-parallel to the magnetic field are constructed. The solutions include higher transcendental functions such as the Meijer G-function and describe D-shaped and diverted configurations w ... [Phys. Plasmas 19, 022508 (2012)] published Wed Feb 22, 2012.
Monte Carlo simulation study of positron generation in ultra-intense laser-solid interactions

Posted: February 21st, 2012, 11:00pm MST

Yonghong Yan, Yuchi Wu, and Zongqing Zhao et al.
The Monte Carlo transport code Geant4 has been used to study positron production in the transport of laser-produced hot electrons in solid targets. The dependence of the positron yield on target parameters and the hot-electron temperature has been investigated in thick targets (mm-scale), where o ... [Phys. Plasmas 19, 023114 (2012)] published Wed Feb 22, 2012.
Electron bunching from a dc-biased, single-surface multipactor with realistically broad energy spectrum and emission angle of secondary electrons

Posted: February 21st, 2012, 11:00pm MST

Dongwon Shin, Seok-Gy Jeon, and Jung-Il Kim et al.
We studied the influences of wide energy spectrum and emission angle of secondary electrons on electron bunching from a dc-biased single surface multipactor. In our previous study of the same system, an ideally narrow energy spread of secondary electrons without emission angle was used in the anal ... [Phys. Plasmas 19, 023113 (2012)] published Wed Feb 22, 2012.
A study of sub-terahertz and terahertz gyrotron oscillators

Posted: February 21st, 2012, 11:00pm MST

S. H. Kao, C. C. Chiu, and K. R. Chu
We present a theoretical study on some of the key physics issues associated with over-moded, sub-terahertz, and terahertz (THz) gyrotron oscillators. Simulations of a large number of fundamental and second cyclotron harmonic modes yield a broad database for physics observations as well as a test ... [Phys. Plasmas 19, 023112 (2012)] published Wed Feb 22, 2012.
Dust charging processes in the nonequilibrium dusty plasma with nonextensive power-law distribution

Posted: February 21st, 2012, 11:00pm MST

Jingyu Gong and Jiulin Du
The dust charging processes in the collections of electrons and ions in the nonequilibrium dusty plasma with power-law distributions are investigated on the basic of a new q-distribution function theory in nonextensive statistics. The electrons and ions in the plasma obey the power-law distributio ... [Phys. Plasmas 19, 023704 (2012)] published Wed Feb 22, 2012.
Particle-in-cell simulations of hollow cathode enhanced capacitively coupled radio frequency discharges

Posted: February 21st, 2012, 11:00pm MST

T. Lafleur and R. W. Boswell
A two-dimensional particle-in-cell simulation has been developed to study density enhancement of capacitively coupled rf discharges with multi-slit electrodes. The observed density increase is shown to result from a hollow cathode effect that takes place within the multi-slit electrode configurati ... [Phys. Plasmas 19, 023508 (2012)] published Wed Feb 22, 2012.
Scaling of linear microtearing stability for a high collisionality National Spherical Torus Experiment discharge

Posted: February 21st, 2012, 11:00pm MST

W. Guttenfelder, J. Candy, and S. M. Kaye et al.
Linear gyrokinetic simulations are performed based on a high collisionality NSTX discharge that is part of dimensionless confinement scaling studies. In this discharge, the microtearing mode is predicted to be unstable over a significant region of the plasma (r/a = 0.5–0.8), motivating comprehensi ... [Phys. Plasmas 19, 022506 (2012)] published Wed Feb 22, 2012.

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Physics of Plasmas Articles from ARTICLES (8 unread)

Posted: February 21st, 2012, 11:00pm MST

Posted: February 21st, 2012, 11:00pm MST

Posted: February 21st, 2012, 11:00pm MST

Posted: February 21st, 2012, 11:00pm MST

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Posted: February 21st, 2012, 11:00pm MST

Posted: February 21st, 2012, 11:00pm MST