Evolution Of Nonlinear Waves in Compressing Plasma

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

关键词: AMPLIFICATION;    COLLISIONLESS PLASMA;    COMPRESSION;    DAMPING;    HOLES;    PLASMA;    PLASMA WAVES;    WAVELENGTHS Compression;    Numerical Simulation;    Nonlinear Effects;   

DOI  :  10.2172/1025014
RP-ID  :  PPPL-4628
PID  :  OSTI ID: 1025014
Others  :  TRN: US1104848

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 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.