Comparison of natural grassy ELM behavior in favorable/unfavorable Bt in EAST

doi:10.1088/2058-6272/ac061b

	Comparison of natural grassy ELM behavior in favorable/unfavorable Bt in EAST
	DING,Genfan 1,4; YANG,Qingquan 4; XU,Guosheng 4; LIN,Xin 3,4; YE,Yang 2; CHEN,Ran 4; WANG,Yumin 4; ZANG,Qing 4; LAN,Heng 4; CHEN,Liang 4
刊名	Plasma Science and Technology
	2021-07-30
卷号	23
关键词	grassy ELM favorable and unfavorable Bt clustered ELM EAST
ISSN号	1009-0630
DOI	10.1088/2058-6272/ac061b
通讯作者	DING,Genfan()
英文摘要	Abstract The properties of grassy edge-localized modes (ELMs) in EAST in the favorable and unfavorable Bt are statistically studied. Statistical analysis indicates that there is no systematical difference in the frequencies of grassy ELMs under the two different magnetic configurations in the similar parameter spaces. The high-frequency grassy ELM (fELM?>?1 kHz) in unfavorable Bt is dependent on the high poloidal beta βp and high triangularity δu, while the high-frequency grassy ELM (fELM?>?1 kHz) in favorable Bt appears to rely on the high plasma density. A frequently occurring phenomenon in favorable Bt defined as ‘clustered ELM’ seems to be the most evident difference in ELM behavior between favorable and unfavorable Bt. Statistical analysis shows that larger plasma-wall outer gap, longer plasma elongation, lower low-hybrid wave heating power and electron cyclotron resonance heating power favor the occurrence of clustered grassy ELMs. Further studies indicate that the generation of clustered grassy ELMs could be correlated with the lower electron temperature in the bulk plasma.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1009-0630-23-9-AC061B
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123972]
专题	中国科学院合肥物质科学研究院
通讯作者	DING,Genfan
作者单位	1.Anhui University, Hefei 230601, People’s Republic of China 2.Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, People’s Republic of China 3.University of Science and Technology of China, Hefei 230026, People’s Republic of China 4.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
推荐引用方式 GB/T 7714	DING,Genfan,YANG,Qingquan,XU,Guosheng,et al. Comparison of natural grassy ELM behavior in favorable/unfavorable Bt in EAST[J]. Plasma Science and Technology,2021,23.
APA	DING,Genfan.,YANG,Qingquan.,XU,Guosheng.,LIN,Xin.,YE,Yang.,...&WANG,Liang.(2021).Comparison of natural grassy ELM behavior in favorable/unfavorable Bt in EAST.Plasma Science and Technology,23.
MLA	DING,Genfan,et al."Comparison of natural grassy ELM behavior in favorable/unfavorable Bt in EAST".Plasma Science and Technology 23(2021).