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Hybrid simulation of fishbone instabilities in the EAST tokamak
Shen, Wei1; Wang, Feng2; Fu, G. Y.3,4; Xu, Liqing1; Li, Guoqiang1; Liu, Chengyue1
刊名NUCLEAR FUSION
2017-11-01
卷号57期号:11
关键词Fishbone Instability East Frequency Chirping Hole-clump Formation Wave-particle Resonance
DOI10.1088/1741-4326/aa7f9c
文献子类Article
英文摘要Hybrid simulations with the global kinetic-magnetohydrodynamic (MHD) code M3D-K have been carried out to investigate the linear stability and nonlinear dynamics of beam-driven fishbone in the experimental advanced superconducting tokamak (EAST) experiment. Linear simulations show that a low frequency fishbone instability is excited at experimental value of beam ion pressure. The mode is mainly driven by low energy beam ions via precessional resonance. The results are consistent with the experimental measurement with respect to mode frequency and mode structure. When the beam ion pressure is increased to exceed a critical value, the low frequency mode transits to a beta-induced Alfven eigenmode (BAE) with much higher frequency. This BAE is driven by higher energy beam ions. Nonlinear simulations show that the frequency of the low frequency fishbone chirps up and down with corresponding hole-clump structures in phase space, consistent with the Berk-Breizman theory. In addition to the low frequency mode, the high frequency BAE is excited during the nonlinear evolution. For the transient case of beam pressure fraction where the low and high frequency modes are simultaneously excited in the linear phase, only one dominant mode appears in the nonlinear phase with frequency jumps up and down during nonlinear evolution.
WOS关键词BEAM-DRIVEN INSTABILITIES ; CLUMP PAIR CREATION ; INTERNAL KINK MODE ; DIII-D TOKAMAK ; PLASMA ; IONS ; RECONSTRUCTION ; PHYSICS
WOS研究方向Physics
语种英语
WOS记录号WOS:000407714900002
资助机构National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; National Natural Science Foundation of China(11605245 ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; 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内容类型期刊论文
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33580]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
2.Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
3.Zhejiang Univ, Inst Fus Theory & Simulat, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China
4.Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA
推荐引用方式
GB/T 7714		 Shen, Wei,Wang, Feng,Fu, G. Y.,et al. Hybrid simulation of fishbone instabilities in the EAST tokamak[J]. NUCLEAR FUSION,2017,57(11).
APA Shen, Wei,Wang, Feng,Fu, G. Y.,Xu, Liqing,Li, Guoqiang,&Liu, Chengyue.(2017).Hybrid simulation of fishbone instabilities in the EAST tokamak.NUCLEAR FUSION,57(11).
MLA Shen, Wei,et al."Hybrid simulation of fishbone instabilities in the EAST tokamak".NUCLEAR FUSION 57.11(2017).
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