Two‐stream instability of electrons in the shock front
Two‐stream instability of electrons in the shock front
复制标题
激波前沿电子的双流不稳定性
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Gedalin
中科院分区：
文献类型：
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作者：
M. Gedalin
在激波阵面中的无碰撞运动中，电子被de霍夫曼-泰勒交叉激波势有效地加速。在激波斜坡内部形成两个电子束：从上游到下游加速的电子束和来自下游区域以匹配上游分布的电子束。这种电子分布是双流不稳定的我们估计典型的时间和空间尺度上的不稳定性发展。我们认为，这种不稳定性可能会导致快速弛豫的电子束和形成所观察到的flattopped分布。
During their collisionless motion in the shock front electrons are efficiently accelerated by the de Hoffman‐Teller cross shock potential. Inside the shock ramp two electron beams are formed: those which are accelerated from upstream to downstream and those which come from the downstream region to match the upstream distribution. This electron distribution is two‐stream unstable. We estimate the typical temporal and spatial scales on which the instability develops. We argue that this instability could result in fast relaxation of the electron beams and formation of the observed flattopped distributions.