Multi-scale structures of electric current generated by collisionless trapped-electron-mode turbulence

doi:10.1088/1361-6587/ac89aa

	Multi-scale structures of electric current generated by collisionless trapped-electron-mode turbulence
	Chen, Xiang 1; Lu, Zhixin 2; Cai, Huishan 1; Ye, Lei 3; Chen, Yang 4; Li, Ding 5,6,7; Liu, Jian 1,9; Liu, Zhaoyuan 8,9
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2022-11-01
卷号	64
关键词	collisionless trapped-electron mode zonal flow shear turbulence-induced current gyrokinetic simulation mesoscale structure continuous wavelet transform
ISSN号	0741-3335
DOI	10.1088/1361-6587/ac89aa
通讯作者	Lu, Zhixin(zhixin.lu@ipp.mpg.de) ; Cai, Huishan(hscai@mail.ustc.edu.cn)
英文摘要	The spatial structure and amplitude of the current induced by collisionless trapped-electron-mode (CTEM) turbulence are investigated by gyrokinetic simulations. It is shown that the barely passing electrons play a crucial role in determining the magnitude and direction of the current density. Two characteristic radial scales of the current density are found. The fine structure (a few ion Larmor radius) of the turbulence-induced current is observed near the rational surfaces. Furthermore, the mesoscale structure (tens of ion Larmor radii) of the turbulence-induced current related to the zonal flow shear is confirmed, especially for the high toroidal mode number (n) CTEM. For the strongly driven CTEM, the zonal flow shear effect on the turbulence-induced current is significant, while it is not visible for the weakly driven CTEM. We show that the magnitude of the CTEM turbulence-induced current density features a moderate local magnitude comparable to the bootstrap current density near rational surfaces, as demonstrated by nonlinear simulations with multi-n modes.
资助项目	National Natural Science Foundation of China[11822505] ; National Natural Science Foundation of China[11835016] ; National Natural Science Foundation of China[11675257] ; Youth Innovation Promotion Association CAS ; Users with Excellence Program of Hefei Science Center CAS[2019HSC-UE013] ; Fundamental Research Funds for the Central Universities[WK3420000008] ; Collaborative Innovation Program of Hefei Science Center CAS[2019HSC-CIP014]
WOS关键词	BOOTSTRAP CURRENT ; PLASMA
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000857625700001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Users with Excellence Program of Hefei Science Center CAS ; Fundamental Research Funds for the Central Universities ; Collaborative Innovation Program of Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128954]
专题	中国科学院合肥物质科学研究院
通讯作者	Lu, Zhixin; Cai, Huishan
作者单位	1.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Peoples R China 2.Max Planck Inst Plasma Phys, Garching, Germany 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Univ Colorado, Ctr Integrated Plasma Studies, Boulder, CO 80309 USA 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 6.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Qilu Univ Technol, Shandong Acad Sci, Shandong Comp Sci Ctr, Natl Supercomp Ctr Jinan, Jinan 250014, Shandong, Peoples R China 9.Qilu Univ Technol, Shandong Comp Sci Ctr, Adv Algorithm Joint Lab, Jinan 250014, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Chen, Xiang,Lu, Zhixin,Cai, Huishan,et al. Multi-scale structures of electric current generated by collisionless trapped-electron-mode turbulence[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2022,64.
APA	Chen, Xiang.,Lu, Zhixin.,Cai, Huishan.,Ye, Lei.,Chen, Yang.,...&Liu, Zhaoyuan.(2022).Multi-scale structures of electric current generated by collisionless trapped-electron-mode turbulence.PLASMA PHYSICS AND CONTROLLED FUSION,64.
MLA	Chen, Xiang,et al."Multi-scale structures of electric current generated by collisionless trapped-electron-mode turbulence".PLASMA PHYSICS AND CONTROLLED FUSION 64(2022).