Investigation of the Ion Energy Transport in the Scrape-Off Layer on the J-TEXT Tokamak Using a Retarding Field Analyzer
Radial profiles of the ion temperature,Ti,have been measured by a double-sided retarding field analyzer（RFA） in the scrape-off layer（SOL） of the J-TEXT tokamak（R = 105 cm,r = 25-29 cm,Bt = 1.8-2.0 T,Ip = 120-180 kA,ne =（2-2.5） × 10^19 m^-3）.Strongly declining Ti profiles in the SOL have been found.T...
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| Published in | Plasma science & technology Vol. 18; no. 6; pp. 601 - 606 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.06.2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1009-0630 |
| DOI | 10.1088/1009-0630/18/6/04 |
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| Abstract | Radial profiles of the ion temperature,Ti,have been measured by a double-sided retarding field analyzer（RFA） in the scrape-off layer（SOL） of the J-TEXT tokamak（R = 105 cm,r = 25-29 cm,Bt = 1.8-2.0 T,Ip = 120-180 kA,ne =（2-2.5） × 10^19 m^-3）.Strongly declining Ti profiles in the SOL have been found.The different e-folding lengths,At,of the Ti profiles in two experimental configurations with different magnetic connection lengths,Lc,reveal that a longer Lc results in weaker parallel energy transport and longer At.In similarity with the particle transport across the SOL,At is approximately proportional to the square root of Lc.Additionally,the poloidal asymmetry has been identified with enhanced ion energy transport across the SOL on the low-field side. |
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| AbstractList | Radial profiles of the ion temperature, T sub(i), have been measured by a double-sided retarding field analyzer (RFA) in the scrape-off layer (SOL) of the J-TEXT tokamak (R = 105 cm, r = 25-29 cm, B sub(t) = 1.8-2.0 T, I sub(p) = 120-180 kA, n sub(e) = (2-2.5) 10 super(19) m super(-3)). Strongly declining T sub(i) profiles in the SOL have been found. The different e-folding lengths, lambda sub(T) of the T sub(i) profiles in two experimental configurations with different magnetic connection lengths, L sub(c), reveal that a longer L sub(c) results in weaker parallel energy transport and longer lambda sub(T) In similarity with the particle transport across the SOL, lambda sub(T)is approximately proportional to the square root of L sub(c). Additionally, the poloidal asymmetry has been identified with enhanced ion energy transport across the SOL on the low-field side. Radial profiles of the ion temperature,Ti,have been measured by a double-sided retarding field analyzer（RFA） in the scrape-off layer（SOL） of the J-TEXT tokamak（R = 105 cm,r = 25-29 cm,Bt = 1.8-2.0 T,Ip = 120-180 kA,ne =（2-2.5） × 10^19 m^-3）.Strongly declining Ti profiles in the SOL have been found.The different e-folding lengths,At,of the Ti profiles in two experimental configurations with different magnetic connection lengths,Lc,reveal that a longer Lc results in weaker parallel energy transport and longer At.In similarity with the particle transport across the SOL,At is approximately proportional to the square root of Lc.Additionally,the poloidal asymmetry has been identified with enhanced ion energy transport across the SOL on the low-field side. |
| Author | 刘海 陈志鹏 庄革 孙岳 朱立志 肖持进 陈杰 |
| AuthorAffiliation | Institute of Fusion and Plasma Research, School of Electrical ＆ Electronic Engineering Huazhong University of Science and Technology, Wuhan 430074, China Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science ＆ Technology of China, Hefei 230026, China Department of Physics and Engineering Physics, University of Saskatchewan, S7N 5E2, Canada Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China |
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| Cites_doi | 10.1088/0029-5515/55/10/104003 10.1088/0741-3335/40/10/007 10.1016/S0022-3115(02)01446-0 10.1088/1009-0630/14/12/02 10.1016/0022-3115(94)00415-3 10.1016/j.jnucmat.2009.01.294 10.1063/1.2955465 10.1088/0741-3335/30/12/012 10.1016/0022-3115(87)90409-0 10.1063/1.3581219 10.1016/S0375-9601(01)00252-3 10.1088/0741-3335/54/6/065001 10.1088/0029-5515/44/4/004 10.1088/0029-5515/54/8/083022 10.1088/0741-3335/52/4/045010 10.1088/0741-3335/48/1/L01 10.1887/0750305592 10.1088/0029-5515/40/5/311 10.1080/10420150.2013.831855 10.1088/0741-3335/53/8/085021 10.1063/1.1619554 10.1016/0022-3115(90)90164-I 10.1063/1.4793785 10.1088/0741-3335/49/12B/S03 10.1063/1.1463416 10.1016/j.jnucmat.2010.08.036 10.1088/0022-3727/18/8/019 10.1016/j.jnucmat.2007.01.195 10.1063/1.3247902 |
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| DocumentTitleAlternate | Investigation of the Ion Energy Transport in the Scrape-Off Layer on the J-TEXT Tokamak Using a Retarding Field Analyzer |
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| Notes | retarding field analyzer; ion energy transport; e-folding length; magnetic connection length; poloidal asymmetry 34-1187/TL LIU Hai,CHEN Zhipeng,ZHUANG Ge,SUN Yue,ZHU Lizhi,XIAO Chijin,CHEN Jie（1Institute of Fusion and Plasma Research, School of Electrical ＆ Electronic Engineering Huazhong University of Science and Technology, Wuhan 430074, China ;2Key Laboratory of Geospace Environment, Chinese Academy of Sciences, University of Science ＆ Technology of China, Hefei 230026, China ;3Department of Physics and Engineering Physics, University of Saskatchewan, S7N 5E2, Canada ;4Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China） Radial profiles of the ion temperature,Ti,have been measured by a double-sided retarding field analyzer（RFA） in the scrape-off layer（SOL） of the J-TEXT tokamak（R = 105 cm,r = 25-29 cm,Bt = 1.8-2.0 T,Ip = 120-180 kA,ne =（2-2.5） × 10^19 m^-3）.Strongly declining Ti profiles in the SOL have been found.The different e-folding lengths,At,of the Ti profiles in two experimental configurations with different magnetic connection lengths,Lc,reveal that a longer Lc results in weaker parallel energy transport and longer At.In similarity with the particle transport across the SOL,At is approximately proportional to the square root of Lc.Additionally,the poloidal asymmetry has been identified with enhanced ion energy transport across the SOL on the low-field side. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 22 Zhuang G (25) 2015; 55 23 Kreuger L K (27) 2012 24 Garcia O E (15) 2006; 48 Elmore S (20) 2012; 54 Asakura N (9) 2004; 44 Stangeby P C (28) 1988; 30 Zhipeng Chen (26) 2012; 14 Silva C (4) 2014; 54 Silva C (10) 2011; 53 Yue Sun (29) 2014; 56 30 31 Romanelli M (12) 1998; 40 13 14 Stangeby P C (32) 1985; 18 17 18 Kirschner A (1) 2000; 40 Brunner D (19) 2013; 55 Kočan M (11) 2010; 52 2 3 5 6 7 8 Garcia O E (16) 2007; 49 21 |
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| Snippet | Radial profiles of the ion temperature,Ti,have been measured by a double-sided retarding field analyzer（RFA） in the scrape-off layer（SOL） of the J-TEXT... Radial profiles of the ion temperature, T sub(i), have been measured by a double-sided retarding field analyzer (RFA) in the scrape-off layer (SOL) of the... |
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| SubjectTerms | Analyzers Asymmetry Energy use Retarding Roots Similarity Ti公司 Tokamak devices Transport 减速 分析仪 径向分布 托卡马克 电场 离子能量 运输 |
| Title | Investigation of the Ion Energy Transport in the Scrape-Off Layer on the J-TEXT Tokamak Using a Retarding Field Analyzer |
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