| Nonlinear fishbone dynamics in spherical tokamaks | |
Wang, Feng1,2 ; Fu, G. Y.1,3,4; Shen, Wei5
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| 刊名 | NUCLEAR FUSION
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| 2017 | |
| 卷号 | 57期号:1页码:1-23 |
| 关键词 | Nstx Fishbone Frequency Chirping Nonlinear Dynamics Wave-particle Interaction |
| DOI | 10.1088/0029-5515/57/1/016034 |
| 文献子类 | Article |
| 英文摘要 | Linear and nonlinear kinetic-MHD hybrid simulations have been carried out to investigate linear stability and nonlinear dynamics of beam-driven fishbone instability in spherical tokamak plasmas. Realistic NSTX parameters with finite toroidal rotation were used. The results show that the fishbone is driven by both trapped and passing particles. The instability drive of passing particles is comparable to that of trapped particles in the linear regime. The effects of rotation are destabilizing and a new region of instability appears at higher qmin (> 1.5) values, q(min) being the minimum of safety factor profile. In the nonlinear regime, the mode saturates due to flattening of beam ion distribution, and this persists after initial saturation while mode frequency chirps down in such a way that the resonant trapped particles move out radially and keep in resonance with the mode. Correspondingly, the flattening region of beam ion distribution expands radially outward. A substantial fraction of initially non-resonant trapped particles become resonant around the time of mode saturation and keep in resonance with the mode as frequency chirps down. On the other hand, the fraction of resonant passing particles is significantly smaller than that of trapped particles. Our analysis shows that trapped particles provide the main drive to the mode in the nonlinear regime. |
| WOS关键词 | CLUMP PAIR CREATION ; INTERNAL KINK ; PLASMAS ; SIMULATIONS ; INSTABILITY ; MODES ; CODE ; IONS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000389248400003 |
| 资助机构 | Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; Department of Energy Scientific Discovery through Advanced Computing (SciDAC)(DE-AC02-09CH11466) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; National Natural Science Foundation of China(11505022) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; China Postdoctoral Science Foundation(2014M561218) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) ; CASHIPS(YZJJ201510) |
| 内容类型 | 期刊论文 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/31715]  |
| 专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
| 作者单位 | 1.Princeton Plasma Phys Lab, Princeton, NJ 08543 USA 2.Dalian Univ Technol, Sch Phys & Optoelect Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China 3.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China 4.Zhejiang Univ, Dept Phys Hangzhou, Hangzhou 310027, Zhejiang, Peoples R China 5.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Feng,Fu, G. Y.,Shen, Wei. Nonlinear fishbone dynamics in spherical tokamaks[J]. NUCLEAR FUSION,2017,57(1):1-23. |
| APA | Wang, Feng,Fu, G. Y.,&Shen, Wei.(2017).Nonlinear fishbone dynamics in spherical tokamaks.NUCLEAR FUSION,57(1),1-23. |
| MLA | Wang, Feng,et al."Nonlinear fishbone dynamics in spherical tokamaks".NUCLEAR FUSION 57.1(2017):1-23. |
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