Experimental investigation of m/n=1/1 and high-order harmonic modes during the sawtooth oscillation in a low beta tokamak plasma
文献类型：期刊论文
| 作者 | Xu, Xiaoyuan1; Wang, Jun1; Wen, Yizhi1; Yu, Yi1; Liu, Adi1; Lan, Tao1; Yu, Changxuan1; Wan, Baonian2; Gao, Xiang2; Sun, Youwen2 |
| 刊名 | PLASMA PHYSICS AND CONTROLLED FUSION
 |
| 出版日期 | 2010 |
| 卷号 | 52页码:14 |
| ISSN号 | 0741-3335 |
| DOI | 10.1088/0741-3335/52/1/015008 |
| 英文摘要 | Sawtooth oscillations were investigated using an electron cyclotron emission imaging diagnostic technique on the HT-7 tokamak. High-order harmonic modes are observed in sawtooth precursors. They cause sharp pressure points, leading to the occurrence of reconnection events at more than one place, and which are not preferential on the low field side of the q similar to 1 radius at low density. The reconnection proceeds in two stages. In the first stage, a weak reconnection happens which is characterized by a slow emergence of a small amount of heat and particles through the finite openings. Subsequently, in the second stage, most of the remaining heat and particles in the core escape outward. The observations at low density indicate that high-order harmonic modes are responsible for the secondary reconnection stage, which has seldom been mentioned in reconnection model. The characteristics of the modes are then described by investigating a large number of sawteeth oscillations with different densities and q(a) values. It is found that when the density increases above a threshold at q(a) = 3.3, the m/n = 1/1 mode amplitude significantly exceeds its harmonics. The threshold decreases as q(a) increases. |
| WOS关键词 | FUSION TEST REACTOR ; HT-7 TOKAMAK ; CRASHES ; INSTABILITY ; TOMOGRAPHY |
| 资助项目 | National Basic Research Program of China[2008CB717800] ; National Nature Science Foundation of China[10335060] ; PRC-US Fusion Cooperation Program[A-5] ; CAS-JSPS Core University ; Ministry of Education ; Academy of Science of P R China ; US Department of Energy, Office of Fusion Energy Science |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000273639600009 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Basic Research Program of China ; National Nature Science Foundation of China ; PRC-US Fusion Cooperation Program ; CAS-JSPS Core University ; Ministry of Education ; Academy of Science of P R China ; US Department of Energy, Office of Fusion Energy Science |
| 源URL | [http://119.78.100.186/handle/113462/31733]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Xu, Xiaoyuan |
| 作者单位 | 1.Univ Sci & Technol China, Dept Modern Phys, Key Lab Plasma Phys, CAS, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA |
| 推荐引用方式 GB/T 7714 | Xu, Xiaoyuan,Wang, Jun,Wen, Yizhi,et al. Experimental investigation of m/n=1/1 and high-order harmonic modes during the sawtooth oscillation in a low beta tokamak plasma[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2010,52:14. |
| APA | Xu, Xiaoyuan.,Wang, Jun.,Wen, Yizhi.,Yu, Yi.,Liu, Adi.,...&Shen, Zuowei.(2010).Experimental investigation of m/n=1/1 and high-order harmonic modes during the sawtooth oscillation in a low beta tokamak plasma.PLASMA PHYSICS AND CONTROLLED FUSION,52,14. |
| MLA | Xu, Xiaoyuan,et al."Experimental investigation of m/n=1/1 and high-order harmonic modes during the sawtooth oscillation in a low beta tokamak plasma".PLASMA PHYSICS AND CONTROLLED FUSION 52(2010):14. |
入库方式： OAI收割
来源：近代物理研究所
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