Role of 3D neoclassical particle flux in density pump-out during ELM control by RMP in DIII-D
文献类型：期刊论文
| 作者 | Liu, Yueqiang1; Paz-Soldan, C.1; Li, Li2; Sun, Youwen3
|
| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 60 |
| ISSN号 | 0029-5515 |
| 关键词 | NTV flux density pumpout ELM control |
| DOI | 10.1088/1741-4326/ab6c35 |
| 通讯作者 | Liu, Yueqiang(liuy@fusion.gat.com) |
| 英文摘要 | The application of three-dimensional (3D) resonant magnetic perturbations, for the purpose of controlling edge localized modes (ELMs) in high confinement (H-mode) tokamak fusion operations, routinely leads to a significant reduction of the plasma density during the discharge, a phenomenon termed `density pump-out'. Understanding the density pump-out phenomenon due to 3D fields is a longstanding challenging issue. This work reports a self-consistent toroidal model that allows initial value simulation of the density pump-out effect. The model successfully reproduces pump-out phenomenology in DIII-D ELM suppression experiments. The radial particle flux, associated with the 3D neoclassical effects (the neoclassical toroidal viscosity, NTV), is found to play an important role in producing the observed large density pump-out. The key physics is associated with the drift kinetic Landau resonances between the toroidal precession of trapped thermal ions and electrons from one side, and the magnetic field perturbation from the other side. Such resonances, occurring near the top of the pedestal region, substantially enhances the radial particle flux associated with NTV. As a general consequence of the resonant NTV flux, larger density pump-out occurs in plasmas with lower collisionality and slower toroidal rotation. |
| WOS关键词 | TRANSPORT ; TOKAMAK |
| 资助项目 | US DoE Office of Science[DE-FG02-95ER54309] ; US DoE Office of Science[DE-FC02-04ER54698] ; US DoE Office of Science[DE-SC0018992] ; agency of the United States Government |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000531875800002 |
| 资助机构 | US DoE Office of Science ; agency of the United States Government |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103265]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Liu, Yueqiang |
| 作者单位 | 1.Gen Atom Co, POB 85608, San Diego, CA 92186 USA 2.Dongbua Univ, Coll Sci, Shanghai 201620, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yueqiang,Paz-Soldan, C.,Li, Li,et al. Role of 3D neoclassical particle flux in density pump-out during ELM control by RMP in DIII-D[J]. NUCLEAR FUSION,2020,60. |
| APA | Liu, Yueqiang,Paz-Soldan, C.,Li, Li,&Sun, Youwen.(2020).Role of 3D neoclassical particle flux in density pump-out during ELM control by RMP in DIII-D.NUCLEAR FUSION,60. |
| MLA | Liu, Yueqiang,et al."Role of 3D neoclassical particle flux in density pump-out during ELM control by RMP in DIII-D".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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