Simulation on the transition of electrostatic instabilities in EAST steady-state scenario  

作　　者：马连杰 张德兵 虞立敏 薛二兵 张先梅 黄娟 肖湧 龚先祖 钱金平 EAST Team Lianjie MA;Debing ZHANG;Limin YU;Erbing XUE;Xianmei ZHANG;Juan HUANG;Yong XIAO;Xianzu GONG;Jinping QIAN;EAST Team(Department of Physics,East China University of Science and Technology,Shanghai 200237,People’s Republic of China;Institute of Plasma Physics,Chinese Academy of Science,Hefei 230031,People’s Republic of China;Institute for Fusion Theory and Simulation,Zhejiang University,Hangzhou 310027,People’s Republic of China)

机构地区：[1]Department of Physics,East China University of Science and Technology,Shanghai 200237,People’s Republic of China [2]Institute of Plasma Physics,Chinese Academy of Science,Hefei 230031,People’s Republic of China [3]Institute for Fusion Theory and Simulation,Zhejiang University,Hangzhou 310027,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第5期20-30,共11页等离子体科学和技术（英文版）

基　　金：supported by the National MCF Energy R&D Program of China(Nos.2019YFE03060000,2019YFE03050000 and 2019YFE03020004);National Natural Science Foundation of China(Nos.12005063 and 11875131);Users with Excellence Program of Hefei Science Center CAS(Nos.2020HSC-UE011 and 2021HSC-UE015);Anhui Provincial Natural Science Foundation(No.2008085Jo4)。

摘　　要：The parameter dependence of transition between electrostatic instabilities is studied using gyrokinetic simulation based on a real discharge of steady-state scenario in the Experimental Advanced Superconducting Tokamak.The scan of radial locations shows that trapped electron mode(TEM)dominates around the core while the ion temperature gradient mode(ITG)simultaneously dominates outside.The maximum growth rate of TEM appears aroundρ=0.24,where the maximum electron temperature gradient R/LTelocates,ρis the normalized poloidal flux.Effects of the parameters on the transition between TEM and ITG instability are studied atρ=0.24.It is found that TEM dominates in the scanning with individually changing R/LTe from 2.50 to 25.02 or the density gradient R/L_(n)from 1.38 to 13.76.Meanwhile,the electron-ion temperature ratio T_(e)/T_(i)is found to destabilize TEM,the effect of Teis more sensitive than that of T_(i).The dominant instability diagrams in the(R/L_(Te),R/L_(Ti))plane at different T_(e)/T_(i)and R/Lnare numerically obtained,which clearly show the parameter range of the dominant TEM or dominant ITG instability region.It is found that the dominant TEM region becomes narrower in the plane by decreasing R/L_(n)when T_(e)/T_(i)>0.5.

关 键 词：gyrokinetic simulation EAST TEM ITG 

分 类 号：TL631.24[核科学技术—核技术及应用]