Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique
文献类型：期刊论文
| 作者 | Yu, G.4; Kramer, G. J.1; Zhu, Y.4; Li, X.3 ; Wang, Y.4; Diallo, A.1; Ren, Y.1; Yu, J. H.4; Chen, Y.4; Liu, X.4
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| 刊名 | PLASMA PHYSICS AND CONTROLLED FUSION
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| 出版日期 | 2021-05-01 |
| 卷号 | 63 |
| 关键词 | ECEI MHD characterization noise suppression spatial resolution |
| ISSN号 | 0741-3335 |
| DOI | 10.1088/1361-6587/abe9f2 |
| 通讯作者 | Yu, G.(gyyu@ucdavis.edu) |
| 英文摘要 | Significant noise suppression for magnetohydrodynamics (MHD) mode characterization in the spatial and spectral domain is achieved by processing two-dimensional (2D) electron cyclotron emission imaging (ECEI) data with a one-dimensional (1D) ECEI technique using a short time window (1 ms). The technique is applied to detect toroidal Alfven eigenmodes (TAEs) in the temporal spectrum and fit their radial envelope using the data from the DIII-D tokamak W-band 2D ECEI system. Using the data length (time window) of only 1 ms, the 1D ECEI can clearly detect the TAEs (similar to 100 kHz) on the spectrum, while similar spectrum quality requires similar to 10 ms data length with the cross power spectrum between two midplane ECEI channels. The 1D ECEI technique also effectively avoids biased fitting when resolving the fine structure of the TAE's radial envelope. The radially spatial resolution of 1D ECEI is constrained by the finite ECE radiation volume of the ECEI receiver. With forward radiation modeling, we find the DIII-D ECEI system can sensitively measure the even parity MHD activities, for which the mode width is >15 mm, and tearing modes (odd parity MHD activities), for which the island full width is >30 mm. |
| 资助项目 | U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FC02-04ER54698] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FG02-99ER54531] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FG02-97ER54415] ; Chinese Scholar Council |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000630726700001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; Chinese Scholar Council |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/120816]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Yu, G. |
| 作者单位 | 1.Princeton Plasma Phys Lab, Princeton, NJ 08523 USA 2.Univ Texas Austin, Austin, TX 78712 USA 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Univ Calif Davis, Davis, CA 95616 USA |
| 推荐引用方式 GB/T 7714 | Yu, G.,Kramer, G. J.,Zhu, Y.,et al. Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2021,63. |
| APA | Yu, G..,Kramer, G. J..,Zhu, Y..,Li, X..,Wang, Y..,...&Luhmann, N. C., Jr..(2021).Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique.PLASMA PHYSICS AND CONTROLLED FUSION,63. |
| MLA | Yu, G.,et al."Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique".PLASMA PHYSICS AND CONTROLLED FUSION 63(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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