EAST NBI强流离子源反向电子流沉积计算  

Calculation of Deposited Energy of Backstream Electrons for EAST NBI High Current Ion Source

作　　者：陈俞钱 谢亚红[1] 胡纯栋[1] 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《原子能科学技术》2015年第B10期497-501,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11405207)

摘　　要：中性束注入是大型托卡马克聚变装置成功和有效的辅助加热方法。中性束核心部件长脉冲弧放电离子源发展的关键在于引出系统和弧室背板(反向电子吸收板)的冷却。将反向电子吸收板永久磁体磁场简化成喇叭形磁场,即可将反向电子向反向电子吸收板的运动简化为带电粒子在喇叭形磁场的会聚螺旋运动。通过简化模型对轰击反向电子吸收板的电子流在反向电子吸收板上的沉积进行相关模拟计算,为长脉冲束引出系统做出优化借鉴。The neutral beam injection （NBI） is a very successful and effective heating method in large Tokamak nuclear fusion device. The cooling of extraction system and back panel of arc chamber limits the development of the high current ion source which is the key part of NBI system. In this paper, the magnetic field of the backstream electron dump plate permanent magnets was simplified as flaring magnetic field. So the move- ment of backstream electrons can he simplified as helical movement of charged particle. The simulation of heat load of dump plate caused by backstream electrons was clone by means of the simplified model, which makes a good reference for optimizing the long pulse extraction system.

关 键 词：反向电子吸收板 带电粒子螺旋运动 电子沉积 

分 类 号：O532.26[理学—等离子体物理]