Numerical simulation of impact of supersonic molecular beam injection on edge localized modes

doi:10.1088/2058-6272/abb456

	Numerical simulation of impact of supersonic molecular beam injection on edge localized modes
	WANG, Yuanzhen 2; XIA, Tianyang 1; LIU, Yue 2
刊名	PLASMA SCIENCE & TECHNOLOGY
	2020-12-01
卷号	22
关键词	BOUT plus plus code SMBI P-B mode ELM ELM size
ISSN号	1009-0630
DOI	10.1088/2058-6272/abb456
通讯作者	LIU, Yue(liuyue@dlut.edu.cn)
英文摘要	A three-field model with the impact of supersonic molecular beam injection (SMBI) based on the BOUT++ code is built to simulate edge localized modes (ELMs). Different parameters of SMBI are explored to find an optimal SMBI scenario for ELM mitigation. The linear simulations show that the growth rate of peeling-ballooning mode is reduced by SMBI. The reduction amplitude of the growth rate is increased when the amplitude or width of SMBI is increased, and when SMBI is deposited at the top, bottom and middle of the pedestal, the reduction amplitude increases successively. The nonlinear simulations show that the ELM size is reduced by SMBI. The reduction amplitude of the ELM size is increased when the amplitude or width of SMBI is increased, and when SMBI is deposited at the bottom, top and middle of the pedestal, the reduction amplitude increases successively. Surface-averaged pressure profiles and filamentary structures are analyzed when the ELMs erupt. Deep deposition of SMBI such as at the top and middle of the pedestal reduces the inward collapse amplitude of the pressure profiles, which can improve the confinement efficiency during ELMs. Shallow deposition of SMBI such as at the middle and bottom of the pedestal reduces the outer extent of the filamentary structures, which can slow down the erosion of plasma-facing components caused by ELMs. In conclusion, shallow deposition of SMBI with sufficient amplitude and width can meet the needs of ELM mitigation.
资助项目	National Key R&D Program of China[2018YFE0303102] ; National Key R&D Program of China[2017YFE0301100] ; National Natural Science Foundation of China[11675217] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017479]
WOS关键词	PLASMA BEHAVIOR ; DISCHARGES
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000576922200001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104476]
专题	中国科学院合肥物质科学研究院
通讯作者	LIU, Yue
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Elect Beams, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	WANG, Yuanzhen,XIA, Tianyang,LIU, Yue. Numerical simulation of impact of supersonic molecular beam injection on edge localized modes[J]. PLASMA SCIENCE & TECHNOLOGY,2020,22.
APA	WANG, Yuanzhen,XIA, Tianyang,&LIU, Yue.(2020).Numerical simulation of impact of supersonic molecular beam injection on edge localized modes.PLASMA SCIENCE & TECHNOLOGY,22.
MLA	WANG, Yuanzhen,et al."Numerical simulation of impact of supersonic molecular beam injection on edge localized modes".PLASMA SCIENCE & TECHNOLOGY 22(2020).