Gaussian process tomography based on Bayesian data analysis for soft x-ray and AXUV diagnostics on EAST*
文献类型：期刊论文
| 作者 | Chao, Yan1,2; Xu, Liqing1 ; Hu, Liqun1; Duan, Yanmin1; Wang, Tianbo3; Yuan, Yi1,2; Zhang, Yongkuan1
|
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 29 |
| 关键词 | bayesian inference Gaussian process tomography plasma physics |
| ISSN号 | 1674-1056 |
| DOI | 10.1088/1674-1056/aba2e4 |
| 通讯作者 | Xu, Liqing(lqxu@ipp.ac.cn) ; Hu, Liqun(lqhu@ipp.ac.cn) |
| 英文摘要 | This work presents the Gaussian process tomography (GPT) based on Bayesian data analysis and its applications in soft x-ray (SXR) and absolute extreme ultraviolet spectroscopy (AXUV) diagnostics on experimental advanced superconducting tokamak (EAST). This is the first application of the GPT method in the AXUV diagnostic system in fusion devices. It is found that even if only horizontal detector arrays are used to reconstruct the two-dimensional (2D) distribution of SXR and AXUV emissivity fields, the GPT method performs robustly and extremely fast, which enables the GPT method to provide real-time feedback on impurity transport and fast magnetohydrodynamics (MHD) events. By reconstructing SXR emissivity in the poloidal cross section on EAST, anm/n= 1/1 internal kink mode has been observed, and the plasma redistribution due to the kink mode is clearly visible in the reconstructions, wheremis the poloidal mode number andnis the toroidal mode number. Sawtooth-like internal disruptions extended throughout the entire plasma core and mainly driven by them/n= 2/1 mode have been acquired. During the sawtooth-like internal disruption crash phase, the conversion from anm= 2 mode to anm= 1 mode is observed. Using the reconstructed AXUV emissivity field we were able to observe the process of impurity accumulated in the plasma core and the mitigation of core impurity due to neon injection in the plasma edge. The data from all other diagnostics involved in the analysis shows that the reconstructions from AXUV measurements are reliable. |
| 资助项目 | National Magnetic Confinement Fusion Science Program of China[11505226] ; National Natural Science Foundation of China[11975273] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000566186800001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Magnetic Confinement Fusion Science Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/70299]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, Liqing; Hu, Liqun |
| 作者单位 | 1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.CNNC, Southwestern Inst Phys, Chengdu 610200, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chao, Yan,Xu, Liqing,Hu, Liqun,et al. Gaussian process tomography based on Bayesian data analysis for soft x-ray and AXUV diagnostics on EAST*[J]. CHINESE PHYSICS B,2020,29. |
| APA | Chao, Yan.,Xu, Liqing.,Hu, Liqun.,Duan, Yanmin.,Wang, Tianbo.,...&Zhang, Yongkuan.(2020).Gaussian process tomography based on Bayesian data analysis for soft x-ray and AXUV diagnostics on EAST*.CHINESE PHYSICS B,29. |
| MLA | Chao, Yan,et al."Gaussian process tomography based on Bayesian data analysis for soft x-ray and AXUV diagnostics on EAST*".CHINESE PHYSICS B 29(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。