电子双流不稳定性如何驱动循环朗缪尔坍缩和连续相干发射
How Electron Two-Stream Instability Drives Cyclic Langmuir Collapse and Continuous Coherent Emission
摘要：
连续的等离子体相干发射是由强电子双流不稳定性的非线性演化驱动的重复朗缪尔崩塌维持的。朗缪尔波在线性阶段受孤立波调制，在非线性阶段受静电哨声波调制。调制不稳定性导致朗缪尔坍缩和电子加热，填充在空穴。高压通过激发短波长离子声模式释放，该模式由电子阻尼并重新激发小尺度朗缪尔波-该过程关闭了保持连续相干发射的反馈回路。
英文摘要：
Continuous plasma coherent emission is maintained by repetitive Langmuir collapse driven by the nonlinear evolution of a strong electron two-stream instability. The Langmuir waves are modulated by solitary waves in the linear stage, and by electrostatic whistler waves in the nonlinear stage. Modulational instability leads to Langmuir collapse and electron heating that fills in cavitons. The high pressure is released via excitation of a short wavelength ion acoustic mode that is damped by electrons and that re-excites small-scale Langmuir waves---this process closes a feedback loop that maintains the continuous coherent emission.
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