Coherent modes and turbulences observations with multi-channel Doppler reflectometer on experimental advanced superconducting tokamak
文献类型：期刊论文
| 作者 | Feng, X.2,3; Liu, A. D.2,3; Zhou, C.2,3 ; Zou, X. L.4; Zhuang, G.2,3; Wang, T. B.5; Liu, Y.6; Wang, S. X.6; Li, Y. Y.6; Shi, T. H.6
|
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 27 |
| ISSN号 | 1070-664X |
| DOI | 10.1063/5.0008303 |
| 通讯作者 | Zhou, C.(zhouchu@ustc.edu.cn) |
| 英文摘要 | With a newly installed 5-channel W-band Doppler reflectometer (DR) in EAST tokamak, many interesting coherence modes and turbulences have been observed. In this paper, the tearing mode (TM), a novel inter-edge localized mode (ELM) electromagnetic mode, and the eigenmode geodesic acoustic mode (GAM) accompanied by a broadband quasi-coherent mode (QCM) during H-mode stage have been reported. The TM could be directly observed in both density fluctuation and perpendicular velocity fluctuation at the DR channel localized in the magnetic island region; moreover, many high-order TM frequency harmonics, dual turbulence peaks inside and outside the island separatrix, and strong flow shear across the island separatrix could also be observed. A high-frequency ( similar to 230 kHz) electromagnetic mode (toroidal mode number n=1) could be identified. The mode is generated dozens of milliseconds before the ELM crash and may affect the ELM dynamic process. The eigenmode GAM excited during the H-mode stage is generated near the top of the density pedestal and then propagates radially inward with a radial wavenumber of about 1 cm - 1. A broadband QCM with a frequency range of 20 - 100 kHz is always accompanied by eigenmode GAM and nonlinearly coupled with both GAM and the background turbulence from the bispectrum analysis. All these results convince the validity of the Doppler reflectometer in multi-scale measurement from the mesoscale to microscale. |
| WOS关键词 | GEODESIC-ACOUSTIC-MODE ; DISCHARGES |
| 资助项目 | National MCF Energy RD Program[2018YFE0311200] ; National MCF Energy RD Program[2017YFE0301204] ; Natural Science Foundation of China[11635008] ; Natural Science Foundation of China[U1967206] ; Natural Science Foundation of China[11975231] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER INST PHYSICS |
| WOS记录号 | WOS:000559321100001 |
| 资助机构 | National MCF Energy RD Program ; Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/70861]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhou, C. |
| 作者单位 | 1.ENN Sci & Technol Dev Co Ltd, Langfang 065001, Peoples R China 2.Univ Sci & Technol China, KTX Lab, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Anhui, Peoples R China 4.CEA, Inst Magnet Fus Res, F-13115 St Paul Les Durance, France 5.CNNC, Southwestern Inst Phys, C-610200 Chengdu, Peoples R China 6.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 7.Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, X.,Liu, A. D.,Zhou, C.,et al. Coherent modes and turbulences observations with multi-channel Doppler reflectometer on experimental advanced superconducting tokamak[J]. PHYSICS OF PLASMAS,2020,27. |
| APA | Feng, X..,Liu, A. D..,Zhou, C..,Zou, X. L..,Zhuang, G..,...&Liu, W. D..(2020).Coherent modes and turbulences observations with multi-channel Doppler reflectometer on experimental advanced superconducting tokamak.PHYSICS OF PLASMAS,27. |
| MLA | Feng, X.,et al."Coherent modes and turbulences observations with multi-channel Doppler reflectometer on experimental advanced superconducting tokamak".PHYSICS OF PLASMAS 27(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。