文献类型：期刊文献

英文题名：Gyrokinetic Simulation of Turbulence in the High-βN Discharge on the Experimental Advanced Superconducting Tokamak

作者：EAST Team[2];Zheng, S. Y.[1];Zhang, D. B.[1];Xue, E. B.[1];Yu, L. M.[1];Zhang, X. M.[1];Gao, X.[2];Huang, J.[2];Xiao, Y.[3];Ding, S. Y.[2];Liu, H. Q.[2];Zang, Q.[2];Lv, B.[2];Li, Y. Y.[2];Zhang, T.[2];Ding, B. J.[2];Wu, M. Q.[2]

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, Zhejiang, Peoples R China

年份：2020

卷号：46

期号：12

起止页码：1137

外文期刊名：PLASMA PHYSICS REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000599169300001)】；

基金：This work was supported by the National Natural Science Foundation of China (grant nos. 11675053 and 11875131) and the National Magnetic Confinement Fusion Program of China (grant no. 2015GB110005).

语种：英文

外文关键词：tokamak; high-beta(N); gyrokinetic simulation; turbulence

摘要：Experiments on Experimental Advanced Superconducting Tokamak (EAST) were performed with high normalized beta (beta(N) similar to 1.9) and favorable energy confinement (H-98,H-y2 similar to 1.1) for the operating space achieved in EAST. Gyrokinetic simulations were carried out for four different beta(N) cases with the experimental plasma parameters and tokamak equilibrium data. It was found that the favorable confinement is effectively maintained when beta(N) increases to 1.9. The radial distribution of potential fluctuation during turbulence saturation phase is consistent with that of thermal transport diffusivity. Turbulence with higher toroidal modes becomes important as beta(N) increases, and zonal flow shearing rate suppresses the turbulence when beta(N) increases to 1.9, which is responsible for the well-maintained confinement.