Beam Distribution Modification By Alfven Modes

White, R. B. ; Gorelenkov, N. ; Heidbrink, W. W. ; Van Zeeland, M. A.

关键词: AMPLITUDES;    BEAM TRANSPORT;    DEUTERIUM;    DISTRIBUTION;    MAGNETIC CONFINEMENT;    MODIFICATIONS;    REVERSED SHEAR Alfven Waves;    Beam Plasma Interactions;    Wave Interaction Particles;   

DOI  :  10.2172/971204
RP-ID  :  PPPL-4483
PID  :  OSTI ID: 971204
Others  :  TRN: US1001706

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 】

Modification of a deuterium beam distribution in the presence of low amplitude Toroidal Alfven (TAE) eigenmodes and Reversed Shear Alfven (RSAE) eigenmodes in a toroidal magnetic confinement device is examined. Comparison with experimental data shows that multiple low amplitude modes can account for significant modification of high energy beam particle distributions. It is found that there is a stochastic threshold for beam transport, and that the experimental amplitudes are only slightly above this threshold. The modes produce a substantial central flattening of the beam distribution.