Evolution Of Nonlinear Waves in Compressing Plasma

Schmit, P. F. ; Dodin, I. Y. ; Fisch, N. J.

Princeton University. Plasma Physics Laboratory.

关键词: Amplification;    Compression;    70 Plasma Physics And Fusion Technology;    Compression, Numerical Simulation, Nonlinear Effects;    Wavelengths Compression, Numerical Simulation, Nonlinear Effects;   

DOI  :  10.2172/1025014
RP-ID  :  PPPL-4628
RP-ID  :  DE-ACO2-09CH11466
RP-ID  :  1025014

美国|英语

来源: UNT Digital Library

【 摘 要 】

Through particle-in-cell simulations, the evolution of nonlinear plasma waves is examined in one-dimensional collisionless plasma undergoing mechanical compression. Unlike linear waves, whose wavelength decreases proportionally to the system length L(t), nonlinear waves, such as solitary electron holes, conserve their characteristic size {Delta} during slow compression. This leads to a substantially stronger adiabatic amplification as well as rapid collisionless damping when L approaches {Delta}. On the other hand, cessation of compression halts the wave evolution, yielding a stable mode.