文献类型：期刊文献

中文题名：Simulation on the transition of electrostatic instabilities in EAST steady-state scenario

英文题名：Simulation on the transition of electrostatic instabilities in EAST steady-state scenario

作者：Ma, Lianjie[1];Zhang, Debing[1];Yu, Limin[1];Xue, Erbing[1];Zhang, Xianmei[1];Huang, Juan[2];Xiao, Yong[3];Gong, Xianzu[2];Qian, Jinping[2];EAST Team

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China;[3]Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China

年份：2023

卷号：25

期号：5

中文期刊名：Plasma Science and Technology

外文期刊名：PLASMA SCIENCE & TECHNOLOGY

收录：;EI(收录号：20231013659445);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000934613900001)】；CSCD:【CSCD2023_2024】；

基金：AcknowledgmentsThis work was 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), and Anhui Provincial Natural Science Foundation (No. 2008085Jo4).

语种：英文

中文关键词：gyrokinetic simulation;EAST;TEM;ITG

外文关键词：gyrokinetic simulation; EAST; TEM; ITG

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.
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 around rho = 0.24, where the maximum electron temperature gradient R/L ( Te) locates, rho is the normalized poloidal flux. Effects of the parameters on the transition between TEM and ITG instability are studied at rho = 0.24. It is found that TEM dominates in the scanning with individually changing R/L ( Te) 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 T (e) is 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/L ( n ) are 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.