论文标题
电子模量在强湍流方向上的电子束在背景等离子体中传播的电子束
Electron Modulational Instability in the Strong Turbulent Regime for an Electron Beam Propagating in Background Plasma
论文作者
论文摘要
我们研究了通过模拟和分析理论通过背景等离子体传播的电子光束的集体过程。一个新的制度，即清楚地识别出langmuir波数据包的不稳定性可以比离子频率快得多。这种新制度的关键特征是电子调节不稳定性，它迅速产生了局部的langmuir波数据包，这又会产生局部电荷分离和强大的离子密度扰动，这是由于浮子力的作用，从而使束Plasma波的相互作用停止了谐振。讨论了该过程的三个进化阶段和观察到的周期性爆发特征。首次证明了等离子体和梁参数空间中不同的物理状态。
We study collective processes for an electron beam propagating through a background plasma using simulations and analytical theory. A new regime where the instability of a Langmuir wave packet can grow locally much faster than ion frequency is clearly identified. The key feature of this new regime is an Electron Modulational Instability that rapidly creates a local Langmuir wave packet, which in its turn produces local charge separation and strong ion density perturbations because of the action of the ponderomotive force, such that the beam-plasma wave interaction stops being resonant. Three evolution stages of the process and observed periodic burst features are discussed. Different physical regimes in the plasma and beam parameter space are demonstrated for the first time.
