热电子与线捆对低频等离子体交换模的稳定作用

用多组份磁流体力学方程导出了有线捆作用的热电子等离子体中,低频等离子体交换模的色散关系;分别求得实频与增长率的分析解;分析了热电子与线捆对低频等离子体交换模的稳定作用。无Line-tying时,当热电子与等离子体密度比大于(ωBi/(-ω*i))~(1/2k_yr_(ci))由于Charge-uncovering效应而稳定。当有强Line-tying效应时,具有弱增长的不稳定性。

THE HOT ELECTRON AND LINE TYING STABILIZATION OF LOW FREQUENCY PLASMA INTERCHANGE MODES

The dispersion relation for the low-frequency plasma interchange modes in a hot-electron plasma with line-tying function is solved by using the MHD equ. of multiple species. The analytic solution of the real frequency and growth rate is also respectively obtained. The stabilizing effect of hot-electron and line-tying on the low-frequency plasma interchange mode is analysed. When there is no line-tying function, and the density ratio of the hot-electrons to the ions is bigger than , then the plasma interchange mode is stabilized by the charge-uncovering. When there is a strong line-tying function, an instability with weak growth rate exists.