论文标题
在过度密度的等离子体中通过环分布的能量电子诱导的等离子体发射
Plasma emission induced by ring-distributed energetic electrons in overdense plasmas
论文作者
论文摘要
根据等离子体发射的标准情况，通过与等离子体相互作用的单个能量电子光束驱动的动力学颠簸的底部不稳定性的非线性发展产生了逃生的辐射。在这里，我们进行了全动力电磁粒子中的模拟，以研究由与过度密度等离子体相互作用的环分布的能量电子引起的等离子体发射。揭示了基本（F）和谐波（H）排放的有效激发，其辐射机制与标准方案不同：（1）辐射的主要模式是通过电子循环基因座maser不稳定性产生的（用于上层HYBRID（UH）和Z MODES和Z MODES和Z MODES）和热词Anisotrop inistropic Inster（供应）（for）（供应）（f） F发射是通过Z和W模式的非线性耦合以及UH模式的非线性耦合产生的。这提出了过度密度等离子体中相干辐射的替代机制。
According to the standard scenario of plasma emission, escaping radiations are generated by the nonlinear development of the kinetic bump-on-tail instability driven by a single beam of energetic electrons interacting with plasmas. Here we conduct fully-kinetic electromagnetic particle-in-cell simulations to investigate plasma emission induced by the ring-distributed energetic electrons interacting with overdense plasmas. Efficient excitations of the fundamental (F) and harmonic (H) emissions are revealed with radiation mechanism(s) different from the standard scenario: (1) The primary modes accounting for the radiations are generated through the electron cyclotron maser instability (for the upper-hybrid (UH) and Z modes) and the thermal anisotropic instability (for the whistler (W) mode); the F emission is generated by the nonlinear coupling of the Z and W modes and the H emission by the nonlinear coupling of the UH modes. This presents an alternative mechanism of coherent radiation in overdense plasmas.
