CAJ | 학술논문

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。
중성속주입시대형탁잡마극취변장치성공화유효적보조가열방법。중성속핵심부건장맥충호방전리자원발전적관건재우인출계통화호실배판（반향전자흡수판）적냉각。장반향전자흡수판영구자체자장간화성나팔형자장，즉가장반향전자향반향전자흡수판적운동간화위대전입자재나팔형자장적회취라선운동。통과간화모형대굉격반향전자흡수판적전자류재반향전자흡수판상적침적진행상관모의계산，위장맥충속인출계통주출우화차감。
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 w hich 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 be simplified as helical movement of charged particle . The simulation of heat load of dump plate caused by backstream electrons was done by means of the simplified model ,w hich makes a good reference for optimizing the long pulse extraction system .