Electron injection in collisionless shocks
Electron injection in collisionless shocks
复制标题
无碰撞冲击中的电子注入
DOI：
10.1086/172039
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
A. Levinson
中科院分区：
文献类型：
--
作者：
A. Levinson
考虑了电子在无碰撞冲击中的加速度。结果表明，只要激波前的阿尔芬马赫数超过43/(β e) 1/2 （β e为激波内热电子压力与磁压力之比），热电子的注入可以由自生哨声控制。在较低马赫数激波下，如果热电子是通过其他机制预先注入的，那么口哨对亚相对论电子的加速仍然是可能的。上游电子对背景流体的约束是由离轴哨子完成的
Electron acceleration in collisionless shocks is considered. It is shown that injection of thermal electrons may be controlled by self-generated whistlers, provided that the Alfven Mach number ahead of the shock exceeds 43/(β e ) 1/2 , where β e is the ratio of thermal electron pressure to magnetic pressure inside the shock. Acceleration of subrelativistic electrons by whistlers at lower Mach number shocks may still be possible if the thermal electrons are preinjected by some other mechanism. The confinement of the upstreaming electrons to the background fluid is accomplished by off-axis whistlers