Two-stream instability with time-dependent drift velocity
Two-stream instability with time-dependent drift velocity
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DOI：
10.1063/1.4885076
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发表时间：
2014-06
影响因子：
2.2
通讯作者：
H. Qin;R. Davidson
中科院分区：
文献类型：
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作者：
H. Qin;R. Davidson
将两个等离子体组分之间恒定相对漂移速度驱动的经典双流不稳定性扩展到漂移速度随时间变化的情况。建立了一种求解方法，以严格定义和计算线性扰动相对于随时间变化的无扰动双流运动的不稳定增长率。给出了振荡双流不稳定性在大范围参数空间上的稳定性图。结果表明，在相对漂移速度中加入振荡分量可以显著降低经典双流不稳定性的增长速率。
The classical two-stream instability driven by a constant relative drift velocity between two plasma components is extended to the case with time-dependent drift velocity. A solution method is developed to rigorously define and calculate the instability growth rate for linear perturbations relative to the time-dependent unperturbed two-stream motions. Stability diagrams for the oscillating two-stream instability are presented over a large region of parameter space. It is shown that the growth rate for the classical two-stream instability can be significantly reduced by adding an oscillatory component to the relative drift velocity.