Effect of ideal internal MHD instabilities on NBI fast ion redistribution in ITER 15 MA scenario  

作　　者：杨冠铭 刘钺强 王志斌 王雍钦 苗雨田 郝广周 Guanming YANG;Yueqiang LIU;Zhibin WANG;Yongqin WANG;Yutian MIAO;Guangzhou HAO(Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China;General Atomics,San Diego,CA 92186-5608,United States of America;Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,People’s Republic of China)

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China [2]General Atomics,San Diego,CA 92186-5608,United States of America [3]Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第5期8-19,共12页等离子体科学和技术（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2022YFE03060002,2019YFE03090100);by the Innovation Program of Southwestern Institute of Physics(No.202001XWCXRC001);partly supported by the Youth Science and Technology Innovation Team of Sichuan Province(No.2022JDTD0003)。

摘　　要：Transport of fast ions is a crucial issue during the operation of ITER.Redistribution of neutral beam injection(NBI)fast ions by the ideal internal magnetohydrodynamic(MHD)instabilities in ITER is studied utilizing the guiding-center code ORBIT(White R B and Chance M S 1984Phys.Fluids 272455).Effects of the perturbation amplitude A of the internal kink,the perturbation frequency f of the fishbone instability,and the toroidal mode number n of the internal kink are investigated,respectively,in this work.The n=1 internal kink mode can cause NBI fast ions transporting in real space from regions of 0<s≤0.32 to 0.32<s≤0.53,where s labels the normalized plasma radial coordinate.The transport of fast ions is greater as the perturbation amplitude increases.The maximum relative change of the number of fast ions approaches 5%when the perturbation amplitude rises to 500 G.A strong transport is generated between the regions of 0<s≤0.05 and 0.05<s≤0.12 in the presence of the fishbone instability.Higher frequency results in greater transport,and the number of fast ions in 0<s≤0.05 is reduced by 30%at the fishbone frequency of 100 k Hz.Perturbations with higher n will lead to the excursion of fast ion transport regions outward along the radial direction.The loss of fast ions,however,is not affected by the internal MHD perturbation.Strong transport from 0<s≤0.05 to 0.05<s≤0.12 does not influence the plasma heating power of ITER,since the NBI fast ions are still located in the plasma core.On the other hand,the influence of fast ion transport from 0<s≤0.32 to 0.32<s≤0.53 needs further study.

关 键 词：ITER NBI fast ions internal kink mode fishbone instability ORBIT 

分 类 号：TL631.24[核科学技术—核技术及应用]