等离子体中电子等离子体波频段的周期性电磁辐射迸发的理论与数值模拟研究

世界上大多托卡马克等离子体中都普遍能观测到一种频率在电子等离子体频率 ω_pe 附近的强烈间歇性电磁辐射。一般认为该辐射物理形成机制是由于电子能量分布的超热尾巴部分存在平行磁场运动的高能非热(bump-in-tail)电子进而引起反常多普勒不稳定性（ADI）产生的。这些辐射对托卡马克的约束效率、安全运行以及托卡马克上利用该频段电磁波进行相关测量的仪器等都会产生重要影响。本项目就是构建一个耦合谐振腔相干波模型和三波共振模型的准线性动理学理论模型，并基于该模型开发一个高效的准线性动理学程序。 并针对EAST等离子体参数条件下ω_pe电磁迸发现象的实验结果进行模拟分析，同时也对CFETR等离子体参数条件下可能出现的电磁迸发进行相关物理预测。

Intense intermittent electromagnetic radiation near the electron plasma frequency(ω_pe burst) has been observed in many tokamak plasmas. It is considered that the radiation is caused by the anomalous Doppler instability(ADI) due to the existing of the non-thermal parallel electron distribution in the superthermal tail of the electron distribution(bump-in-tail). The radiation would have significant effects on the efficiency of confinement and safe operation of tokamak plasmas, and also the measurement by the radiometer with the frequencies near ω_pe. In this proposed project, we would build a physics model by solving the quasilinear kinetic equation coupling a cavity model and a triple-wave resonance model. We then develop an efficient code based on the model to simulate the ω_pe burst in the EAST plasmas, and also to have some predictions of ω_pe burst for CFETR plasmas.