Neutron-yield reduction in sawtooth crashes from n=2 resonant magnetic perturbations in EAST
文献类型：期刊论文
| 作者 | Xu, Liqing ; Xu, Ming; Chao, Yan; Yuan, Yi; Zhong, Guoqiang; Jia, Manni; Zhang, Jiayuan; Chu, Yuqi; Liu, Jianwen; Duan, Yanmin
|
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 29 |
| ISSN号 | 1070-664X |
| DOI | 10.1063/5.0102281 |
| 通讯作者 | Xu, Ming(mxu@ipp.cas.cn) ; Duan, Yanmin(ymduan@ipp.ac.cn) |
| 英文摘要 | A significant reduction in neutron yield in the plasma core has been observed in EAST neutral beam injection into plasmas with a low-edge safe factor of q 95 = 3.5 and a n = 2 resonant magnetic perturbation (RMP) during a sawtooth crash. Harmonics of the m/n = 1/1 mode (m and n being the poloidal and toroidal mode numbers) develop simultaneously. A sawtooth crash is triggered when the current of the RMP exceeds a critical value; saturated fishbone phase occurs with small RMP currents. Soft x-ray (SXR) tomographic patterns obtained during sawtooth crashes have annular hot-ring shapes outside the q = 1 surface that are similar to those of double tearing modes triggered by off-axis sawtooth crashes in TFTR reversed magnetic shear plasma. M3D nonlinear simulations confirmed the initial penetration of the n = 2 RMP in the plasma core and further demonstrated a complete sawtooth crash with the appearance of a right annular hot ring near the q = 1 surface. Reconstruction of the trajectory of SXR signals before the crash shows chaotic behavior. Moreover, a high-frequency mode was seen to appear just before the sawtooth crash, accompanied by an edge geodesic acoustic mode. This edge mode is free in the saturated fishbone phase. The role of high-frequency mode in the sawtooth crash remains unclear. Published under an exclusive license by AIP Publishing. |
| WOS关键词 | TRANSITION ; STABILITY ; CHAOS |
| 资助项目 | Science Foundation of ASIPP ; National Magnetic Confinement Fusion Energy R&D Program of China ; National Natural Science Foundation of China ; [DSJJ-2021-03] ; [2022YFE03010003] ; [12275309] ; [11975267] ; [12175271] ; [11875293] ; [11975273] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AIP Publishing |
| WOS记录号 | WOS:000885385200003 |
| 资助机构 | Science Foundation of ASIPP ; National Magnetic Confinement Fusion Energy R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/131725]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, Ming; Duan, Yanmin |
| 作者单位 | Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Liqing,Xu, Ming,Chao, Yan,et al. Neutron-yield reduction in sawtooth crashes from n=2 resonant magnetic perturbations in EAST[J]. PHYSICS OF PLASMAS,2022,29. |
| APA | Xu, Liqing.,Xu, Ming.,Chao, Yan.,Yuan, Yi.,Zhong, Guoqiang.,...&Hu, Liqun.(2022).Neutron-yield reduction in sawtooth crashes from n=2 resonant magnetic perturbations in EAST.PHYSICS OF PLASMAS,29. |
| MLA | Xu, Liqing,et al."Neutron-yield reduction in sawtooth crashes from n=2 resonant magnetic perturbations in EAST".PHYSICS OF PLASMAS 29(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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