The factors determining the evolution of edge-localized modes in plasmas driven by lower hybrid currents
文献类型：期刊论文
| 作者 | Zhang, Xiao4,5,6; Zang, Qing1,2 ; Wang, Yi-feng1,2; Han, Xiao-feng1,2; Yang, Qing-quan1,2; Xu, Shuai1,3; Meng, Ling-yi1,2; Huang, Jia1,2; Lin, Xiao-dong5,6; Wang, Ke5,6
|
| 刊名 | PLASMA PHYSICS AND CONTROLLED FUSION
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 62 |
| 关键词 | lower hybrid radio frequency edge-localized modes H-mode tungsten divertor pedestal |
| ISSN号 | 0741-3335 |
| DOI | 10.1088/1361-6587/abbf0a |
| 通讯作者 | Zhang, Xiao(zxyzkd@ustc.edu.cn) |
| 英文摘要 | Modulated lower-hybrid waves (LHWs) are injected into the Experimental Advanced Superconducting Tokamak to determine the physical principles responsible for the suppression or mitigation of edge-localized modes (ELMs). There are two cases of modulated-ELM evolution (stable and unstable cases), because of two different modulated pedestal densities. They can be attributed to additional magnetic perturbations induced by the LHWs, similarly to the effect of resonant magnetic perturbations. As regards the case of unstable modulated ELM evolution, the plasma stored energy increases as the LHWs turn on. In contrast, the central line-averaged electron density decreases, which is different from the case of ELM suppression or from the stably modulated case. The effect of LHWs or density 'pump-out' effect can pass across the top of the pedestal region and enter the interior of the density pedestal, causing a decrease in the electron density gradient and its value at the top of the pedestal. Simultaneously, the pressure gradient and edge bootstrap current density increase. For ELM suppression (or for the stable) case, LHWs can couple only with the plasma outside the top region of pedestal, because of the higher top value of density pedestal. Thus, LHWs can pump out the electron density significantly only in the pedestal foot region, producing a larger gradient of electron density pedestal. Statistical analysis of the data indicates that there is a threshold value of the central line-averaged electron density for each of the two modulated ELM cases. Furthermore, the ELM amplitude is modulated by LHWs with a time delay of hundreds of microseconds, which may be further evidence that LHWs have a significant impact on the evolution of ELMs and pedestal structures. All these results imply that there is a significant correlation between the ELM behavior and the electron density profiles modulated by LHWs. |
| WOS关键词 | ELMY H-MODES ; FREQUENCY CONTROL ; HIGH-DENSITY ; REGIME ; CONFINEMENT ; STABILITY ; PHYSICS ; BETA |
| 资助项目 | National Natural Science Foundation of China[11905144] ; National Key R and D Program of China[2017YFE0301105] ; National Key R and D Program of China[2017YFE0301104] ; National Magnetic Confinement Fusion Science Program of China[2015GB103001] ; Shenzhen Clean Energy Research institute ; China Postdoctoral Science Foundation[2018M640812] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000582988300001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; National Key R and D Program of China ; National Magnetic Confinement Fusion Science Program of China ; Shenzhen Clean Energy Research institute ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/104820]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Xiao |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230031, Peoples R China 3.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Jlich, Germany 4.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China 5.Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China 6.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiao,Zang, Qing,Wang, Yi-feng,et al. The factors determining the evolution of edge-localized modes in plasmas driven by lower hybrid currents[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2020,62. |
| APA | Zhang, Xiao.,Zang, Qing.,Wang, Yi-feng.,Han, Xiao-feng.,Yang, Qing-quan.,...&Gong, Xiangzu.(2020).The factors determining the evolution of edge-localized modes in plasmas driven by lower hybrid currents.PLASMA PHYSICS AND CONTROLLED FUSION,62. |
| MLA | Zhang, Xiao,et al."The factors determining the evolution of edge-localized modes in plasmas driven by lower hybrid currents".PLASMA PHYSICS AND CONTROLLED FUSION 62(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。