It is suggested that the instability is excited in the low density plasma when the electron beam drift velocities exceed the ion acoustic speed.
不稳定性产生的可能机制是由于电子束穿过低密度本底等离子体的漂移速度超过离子声速而激发起来的。
2
A single particle impact test device was designed and manufactured by the authors. Several pure metals and low carbon steels were impacted at different velocities using this test device.
作者在自行设计并制造的一台单粒子冲击试验机上对部分纯金属和低碳钢在不同的冲击速度下进行冲击试验。
3
The numerical simulating results of liquid velocities agree with the experimental data at low gas flow rate.