Experimental response of the divertor particle flux to internal transport barrier dynamics in EAST high-beta(N) discharges
文献类型：期刊论文
| 作者 | Long, F. F.1,3; Ming, T. F.1 ; Zhang, T.1; Meng, L. Y.1,3; Wu, M. Q.2,4; Xu, J. C.1,3; Gao, S. L.1,3; Ye, K. X.1,3; Zhou, F.1,3; Zhuang, Q.1,3
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| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 60 |
| 关键词 | internal transport barrier high normalized beta divertor particle flux Shafranov shift tokamak |
| ISSN号 | 0029-5515 |
| DOI | 10.1088/1741-4326/ab668c |
| 通讯作者 | Ming, T. F.(tfming@ipp.ac.cn) |
| 英文摘要 | Experiments in EAST have concentrated on studying the internal transport barrier (ITB) regime in high normalized beta () discharges, where the study of the compatibility between ITB dynamics and divertor plasmas is an important step for future steady-state and high-performance plasma operations. In this work, the characteristics of the divertor particle flux and their responses to ITB dynamics have been studied in high- discharges. In order to describe the characteristics, the ITB duration is divided into two phases: phase I (i.e. ITB formation) and phase II (i.e. ITB degradation), according to the variation of plasma stored energy. In phase I, the particle flux near the inner strike point (SP) is continuously enhanced during the inter-edge-localized mode (ELM) phase in both the lower single-null and upper single-null configurations. The total particle flux in the scrape-off layer (SOL) region reveals a similar trend with an increase of the flux near the SP. However, in the private flux region (PFR) the total particle flux shows a reduction. Meanwhile, a movement of the SP away from the divertor corner is also observed during the ITB formation. In phase II, the particle flux near the inner SP, the total particle flux in the inner SOL and PFR region recover to their initial level before ITB formation, respectively. Additionally, the particle decay length is obviously reduced in phase I and then gradually enhanced in phase II. The continuous variation of the particle flux at the inner divertor target is in accordance with a compression of the magnetic flux surfaces due to ITB formation, which increases the gradient of electron density in the edge region. It is indicative that the ITB has a feasible impact on the behavior of divertor plasmas by means of increasing the Shafranov shift during the inter-ELM phase. |
| WOS关键词 | DENSITY PROFILE ; TOKAMAK ; SHEAR ; EQUILIBRIUM ; PLASMAS ; PHYSICS ; MODE ; REFLECTOMETRY ; STABILITY ; OPERATION |
| 资助项目 | National Key R&D Program of China[2017YFE0301205] ; National Key R&D Program of China[2017YFE0300501] ; National Natural Science Foundation of China[11975271] ; National Natural Science Foundation of China[11605244] ; National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11875294] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000520090000001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103811]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Ming, T. F. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Coll Optoelect Engn, Shenzhen 518060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Long, F. F.,Ming, T. F.,Zhang, T.,et al. Experimental response of the divertor particle flux to internal transport barrier dynamics in EAST high-beta(N) discharges[J]. NUCLEAR FUSION,2020,60. |
| APA | Long, F. F..,Ming, T. F..,Zhang, T..,Meng, L. Y..,Wu, M. Q..,...&Gao, X..(2020).Experimental response of the divertor particle flux to internal transport barrier dynamics in EAST high-beta(N) discharges.NUCLEAR FUSION,60. |
| MLA | Long, F. F.,et al."Experimental response of the divertor particle flux to internal transport barrier dynamics in EAST high-beta(N) discharges".NUCLEAR FUSION 60(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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