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Experimental observation of reverse-sheared Alfven eigenmodes (RSAEs) in ELMy H-mode plasma on the EAST tokamak

文献类型：期刊论文

作者Zhang, Tao1; Liu, Haiqing1; Li, Guoqiang1; Zeng, Long1; Yang, Yao1; Ming, Tingfeng1; Gao, Xiang1,2; Lian, Hui1; Li, Kai1; Liu, Yong1
刊名PLASMA SCIENCE & TECHNOLOGY
出版日期2018-11-01
卷号20期号:11页码:8
关键词reverse-sheared Alfven eigenmodes ITB q profile
ISSN号1009-0630
DOI10.1088/2058-6272/aac9b5
通讯作者Liu, Haiqing(hqliu@ipp.ac.cn)
英文摘要Reverse-sheared Alfven eigenmodes (RSAEs) have been observed by using an interferometer and ECE diagnostics in NBI heated ELMy H-mode plasma on EAST tokamak. A typical feature of these modes is a fast frequency sweeping upward from similar to 80 kHz to similar to 110 kHz in hundred milliseconds during which the plasma temperature, density and rotation keeps no change. Only core channels of the interferometer can observe these modes, implying a core localized mode. The ECE measurement further showed that these modes located at about rho = 0.37-0.46, just around the position of q(min) with rho similar to 0.4. These core localized modes are very weak in the magnetic fluctuations measured by mirnov probes mounted at the machine vacuum vessel. A multiple frequency fluctuation component, seemingly the so-called 'grand cascades', was also clearly observed on the ECE signal at rho = 0.46. During the phase, a transient internal transport barrier (ITB) in ion temperature and toroidal rotation was observed and the ITB foot was just close to the position of q(min). A modulation of RSAE frequency by ELM event was observed and this modulation could be attributed to rotation decrease or q(min) increase due to ELM. Further study of these modes in EAST can provide valuable constraints for the q profile measurement and will be important for the long pulse operation.
WOS关键词INTERNAL TRANSPORT BARRIER ; DIII-D ; MAGNETIC SHEAR ; DISCHARGES ; JT-60U ; ELECTRON ; DRIVEN ; JET
资助项目National Key R&D Program of China[2014GB106004] ; National Natural Science Foundation of China[11605235] ; National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11505221] ; Scientific Research Grant of Hefei Science Center of CAS[2015SRG-HSC010]
WOS研究方向Physics
语种英语
WOS记录号WOS:000443826500001
出版者IOP PUBLISHING LTD
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; 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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/38749]  
专题合肥物质科学研究院_中科院等离子体物理研究所
通讯作者Liu, Haiqing
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Tao,Liu, Haiqing,Li, Guoqiang,et al. Experimental observation of reverse-sheared Alfven eigenmodes (RSAEs) in ELMy H-mode plasma on the EAST tokamak[J]. PLASMA SCIENCE & TECHNOLOGY,2018,20(11):8.
APA Zhang, Tao.,Liu, Haiqing.,Li, Guoqiang.,Zeng, Long.,Yang, Yao.,...&Han, Xiang.(2018).Experimental observation of reverse-sheared Alfven eigenmodes (RSAEs) in ELMy H-mode plasma on the EAST tokamak.PLASMA SCIENCE & TECHNOLOGY,20(11),8.
MLA Zhang, Tao,et al."Experimental observation of reverse-sheared Alfven eigenmodes (RSAEs) in ELMy H-mode plasma on the EAST tokamak".PLASMA SCIENCE & TECHNOLOGY 20.11(2018):8.

入库方式： OAI收割

来源：合肥物质科学研究院

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