Gas ionization induced by a high speed plasma injection in space
Gas ionization induced by a high speed plasma injection in space
复制标题
太空中高速等离子体注入引起的气体电离
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
J. Burch
中科院分区：
文献类型：
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作者：
S. Sasaki;N. Kawashima;K. Kuriki;M. Yanagisawa;T. Obayashi;W. T. Roberts;D. L. Reasoner;W. Taylor;P. Williamson;P. Banks;J. Burch
在空间实验室1号上进行的粒子加速器空间实验（SEPAC）观测到了由快速等离子体注入引起的气体电离。当从轨道飞行器注入脉冲高密度等离子体时，低混合频率附近的波被增强，并且在等离子体注入后几十毫秒内，与轨道飞行器一起漂移的周围气体被电离。只有当进入轨道器货舱的等离子体通量和垂直于磁场的轨道速度相对较大时，才观察到长时间的气体电离。这种效应可以用临界速度电离（CVI）的概念来解释，尽管垂直于磁场的气体速度小于阿尔芬临界速度。
Gas ionization induced by a fast plasma injection has been observed with the Space Experiments with Particle Accelerators (SEPAC) Experiment on Spacelab-1. When an impulsive high-density plasma was injected from the orbiter, waves near the lower-hybrid frequency were enhanced, and the surrounding gas drifting with the orbiter was ionized for several tens of milliseconds after the plasma injection. The long-duration gas ionization was observed only when the plasma flux incoming to the orbiter cargo bay and the orbital velocity perpendicular to the magnetic field were relatively large. This effect has been explained by the concept of critical velocity ionization (CVI) for the gas drifting with the orbiter, although the gas velocity perpendicular to the magnetic field was less than the Alfven critical velocity.