垂直无碰撞激波中多离子波动和He2+加热

应用一维混合模拟方法数值研究了高Alfven－Mach数垂直无碰撞激波中He²⁺的运动及其加热机制．结果表明，在激波面处将会产生向下游传播的多离子波动，它对He²⁺加热有着重要影响．He²⁺的加热过程可能包含两个阶段，由于质子温度各向异性激发的质子回旋波和镜波先使He²⁺加热，而He²⁺与多离子波动相互作用进一步使He²⁺加热到更高的温度．

MULTIPLE ION WAVE AND He~(2+) HEATING AT PERPENDICULAR COLLISIONLESS SHOCK

By using an one-dimensional hybrid code, He2+ motion and heating at high Alfven-Mach number perpendicular collisionless shock are studied numerically. The results show that multiple ion wave forms at the shock front and propagates toward the downstream from the shock. Its effect on He2+ heating is important. He2+ heating processes maybe include two stages; the first is due to the ion cyclotron waves and mirror waves driven by ion temperature anisotropies, then, the interaction between He2+ and multiple ion wave leads He2+ heating until the higher temperature.