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Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak

文献类型：期刊论文

作者Ye,Cheng2,4; Sun,You-Wen4; Wang,Hui-Hui4; Wang,Zheng-Xiong2; Wei,Lai2; Ma,Qun4; Zang,Qing4; Gu,Shuai1,3; He,Kai-Yang4; Chu,Nan4
刊名Nuclear Fusion
出版日期2021-04-21
卷号61
关键词error field penetration LHCD heating density scaling
ISSN号0029-5515
DOI10.1088/1741-4326/abeed5
通讯作者Wang,Hui-Hui() ; Wang,Zheng-Xiong()
英文摘要AbstractThe density scaling of n = 1 error field penetration is investigated under radio-frequency (RF)-dominant heated L-mode discharges in the EAST tokamak. It is found that the density scaling of the threshold field strength for error field penetration in lower-hybrid current drive (LHCD) plasmas is about br∝ne0.4, where br represents the error field amplitude. The results show a weaker density dependence compared to that observed in the previous ohmic heated discharges (Wang et?al 2018 Nucl. Fusion 58 056024). For a better understanding of the density scaling, it is compared with field penetration theories, and it is found that it lies in the Waelbroeck regime. The observed scaling is consistent with that evaluated with the magnetohydrodynamic (MHD) theory on error field penetration, for which all the physical parameters are determined experimentally. Due to the density dependence of LHCD heating efficiency, the stronger negative correlation between density and temperature results in a weaker density scaling in these LHCD plasmas. Using realistic parameters under LHCD and ohmic heating as input, respectively, the numerical results based on a reduced MHD model reproduce well the scaling from the error field penetration theory and the observations. Besides, the density scaling in various tokamak operational regimes is also numerically investigated. This provides an excellent validation of MHD theory on error field penetration in the RF-dominant heated L-mode discharges.
语种英语
WOS记录号IOP:0029-5515-61-5-ABEED5
出版者IOP Publishing
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/121837]  
专题中国科学院合肥物质科学研究院
通讯作者Wang,Hui-Hui; Wang,Zheng-Xiong
作者单位1.Oak Ridge Associated Universities, Oak Ridge, TN 37830, United States of America
2.Key Laboratory of Materials Modification by Beams, Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China
3.General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America
4.Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China
推荐引用方式
GB/T 7714		 Ye,Cheng,Sun,You-Wen,Wang,Hui-Hui,et al. Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak[J]. Nuclear Fusion,2021,61.
APA Ye,Cheng.,Sun,You-Wen.,Wang,Hui-Hui.,Wang,Zheng-Xiong.,Wei,Lai.,...&Chen,Ying-Jie.(2021).Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak.Nuclear Fusion,61.
MLA Ye,Cheng,et al."Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak".Nuclear Fusion 61(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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