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Effect of edge plasma density on hot spot in LHCD plasma in EAST

文献类型：期刊论文

作者Ding, B. J.1; Wu, C. B.1,4; Li, Y. C.3; Li, M. H.1; Wang, Y. F.1,4; Zhang, B.1; Yan, G. H.1,4; Liu, H. Q.1; Wang, L.1; Wang, M.1
刊名NUCLEAR MATERIALS AND ENERGY
出版日期2021-06-01
卷号27
关键词Lower hybrid current drive Hot spot Edge plasma density Heat flux Tokamak
DOI10.1016/j.nme.2021.100992
通讯作者Ding, B. J.(bjding@ipp.ac.cn) ; Li, Y. C.(ycunli@ipp.ac.cn)
英文摘要Hot spot is a serious challenge limiting long pulse operation with LHCD (lower hybrid current drive) in tokamak. In order to mitigate the hot spot in guard limiter and improve LHCD capability, effect of edge plasma density on inducing hot spot and current drive has been studied in EAST. The temperature in the guard limiter of the LH antenna, inducing hot spot directly, increases with edge density and LH power. Studies show that the hot spot is mainly ascribed to the heat flux in front of LH antenna. Further simulation indicates that such spot corresponds to the peak position of edge density due to local LH electric field. In addition, due to the stronger parametric instability (PI) behavior in the case of higher edge density, the current drive capability decreases with edge density. Strike-point splitting behaviors appear with density increase, in agreement with current profiles in the edge region and the reduction of total driven current, suggesting that more power is deposited in edge region, which does more contribution to hot spot. Above studies offer one possible idea to optimize the edge density so as to satisfy the coupling, mitigate the heat flux in the guard limiter, and improve current drive capability for fusion device.
WOS关键词HYBRID CURRENT DRIVE ; PARAMETRIC-INSTABILITIES
资助项目National Key Research and Development Program of China[2016YFA0400603] ; National Key Research and Development Program of China[2016YFA0400602] ; national natural science foundation of China[11975266] ; national natural science foundation of China[11775259] ; national natural science foundation of China[11675214] ; national natural science foundation of China[11805233] ; national natural science foundation of China[U19A20113]
WOS研究方向Nuclear Science & Technology
语种英语
WOS记录号WOS:000670923000009
出版者ELSEVIER
资助机构National Key Research and Development Program of China ; national natural science foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123535]  
专题中国科学院合肥物质科学研究院
通讯作者Ding, B. J.; Li, Y. C.
作者单位1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.ENEA, Fus & Nucl Safety Dept, Via E Fermi 45, I-00044 Rome, Italy
3.Shenzhen Univ, Coll Optoelect Engn, Shenzhen 518060, Peoples R China
4.Univ Sci & Technol China, Hefei 230026, Peoples R China
5.CEA, IRFM, F-13108 St Paul Les Durance, France
6.MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA
推荐引用方式
GB/T 7714		 Ding, B. J.,Wu, C. B.,Li, Y. C.,et al. Effect of edge plasma density on hot spot in LHCD plasma in EAST[J]. NUCLEAR MATERIALS AND ENERGY,2021,27.
APA Ding, B. J..,Wu, C. B..,Li, Y. C..,Li, M. H..,Wang, Y. F..,...&Wan, B. N..(2021).Effect of edge plasma density on hot spot in LHCD plasma in EAST.NUCLEAR MATERIALS AND ENERGY,27.
MLA Ding, B. J.,et al."Effect of edge plasma density on hot spot in LHCD plasma in EAST".NUCLEAR MATERIALS AND ENERGY 27(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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