托卡马克中低杂波电流驱动下高能电子行为分析

Behavioure of High Energy Electrons on Tokamak with Low Hybrid Current Drive

在低杂波电流驱动下,快电子和逃逸电子构成了非麦克斯韦电子分布的高能尾部.高能快电子由于低的碰撞频率可以有效的携带电流来实现非感应电流驱动.但是在一定条件下,快电子可以转化为高能逃逸电子,这将对装置第一壁材料造成损伤.利用快电子轫致辐射测量以及逃逸电子诊断系统研究了低杂波电流驱动下快电子分布和逃逸电子的产生,并分析了快电子转化为逃逸电子的现象.

Fast electrons and runaway electrons constitute the high- energy tail of electron maxwell distribution during low hybrid current drive. High energy fast electron can effectively carry current driving to achieve no--induced current drive due to low collision frequency. But under certain conditions, fast electron can turn into runaway electron. It will do damage to the device first wall material. This paper studies fast electron distribution and the runaway electrons generation by means of fast electron bremsstrahlung array and runaway electron diagnose. The conversion phenomenon from fast electron to runaway electron can be analyzed.