HL-3装置快离子损失探测器研制与实验研究  

Development and experimental research of fast ion loss detection system in HL-3 device

作　　者：许佳 张洁 韩玉箫 唐昌建[1] 张轶泼 XU Jia;ZHANG Jie;HAN Yuxiao;TANG Changjian;ZHANG Yipo(College of Physics,Sichuan University,Chengdu 610065;Southwestern Institute of Physics,Chengdu 610027)

机构地区：[1]四川大学物理学院,成都610065 [2]核工业西南物理研究院,成都610027

出　　处：《辐射防护》2024年第5期499-509,共11页Radiation Protection

摘　　要：托卡马克等离子体中的快离子损失会降低加热效率,快离子损失探测器(FILD)可以同时测量快离子损失的损失率、能量和螺距角,是监测和研究快离子损失现象的重要手段之一。基于中国环流三号(HL-3)装置的放电参数,首先通过模拟不同初始螺距角下80 keV氘离子在HL-3装置中的运动轨迹确认探头的安装位置。其次,通过模拟不同入射能量、磁场强度、入射角情况下氘离子的运动轨迹确认准直器尺寸。然后,通过模拟氘离子经过设计尺寸准直器后在掺银硫化锌[ZnS(Ag)]闪烁屏上的横向、纵向最远运动距离,确认闪烁屏尺寸,最后将设计好的基于掺银硫化锌[ZnS(Ag)]闪烁屏的快离子损失探测器安装在HL-3装置上进行实验研究。研究结果显示快离子损失探测器能成功测量到快离子损失信号,并监测到环向阿尔芬本征模(TAE)诱发的快离子损失。Fast ion losses in tokamak plasma can reduce the heating efficiency.Fast ion loss detector(FILD)can simultaneously measure the loss rate,energy,and pitch angle of fast ions,making it one of the important means for monitoring and studying the phenomenon of fast ion losses.Based on the discharge parameters of the Chinese HL-3 device,the installation position of the probe is confirmed by simulating the motion trajectory of 80 keV deuterium ions in the HL-3 device with different initial pitch angles at first.Secondly,the collimator size is confirmed by simulating the motion trajectory of deuterium ions under different incident energy,magnetic field strength,and incident angles.Thirdly,by simulating the transverse and longitudinal maximum movement distance of deuterium ions on the silver-doped zinc sulfide ZnS(Ag)scintillator screen after passing through the collimator with designed size,the size of the scintillator screen is confirmed.Finally,the designed fast ion loss detector(FILD)based on the silver-doped zinc sulfide ZnS(Ag)scintillator screen is installed in the HL-3 device for experimental research.The research results show that the fast ion loss detector(FILD)can successfully measure the fast ion loss signal and monitor the fast ion loss induced by the toroidal Alfvén eigenmodes(TAE)mode.

关 键 词：快离子损失 能量 螺距角 ZnS(Ag) 环向阿尔芬本征模 

分 类 号：TL812[核科学技术—核技术及应用] TL65