The theoretical study on intermittency and propagation of geodesic acoustic mode in L-mode discharge near tokamak edge

doi:10.1088/2058-6272/abdc13

	The theoretical study on intermittency and propagation of geodesic acoustic mode in L-mode discharge near tokamak edge
	LIU, Zhaoyang 2; ZHANG, Yangzhong 3; MAHAJAN, Swadesh Mitter 1; LIU, Adi 2; XIE, Tao 4; ZHOU, Chu 2; LAN, Tao 2; XIE, Jinlin 2; LI, Hong 2; ZHUANG, Ge 2
刊名	PLASMA SCIENCE & TECHNOLOGY
	2021-03-01
卷号	23
关键词	zonal flow drift wave intermittency GAM L– H mode
ISSN号	1009-0630
DOI	10.1088/2058-6272/abdc13
通讯作者	LIU, Zhaoyang(lzy0928@mail.ustc.edu.cn)
英文摘要	Through a systematically developed theory, we demonstrate that the motion of Instanton identified in Zhang et al (2017 Phys. Plasmas 24 122304) is highly correlated to the intermittent excitation and propagation of geodesic acoustic mode (GAM) that is observed in tokamaks. While many numerical simulations have observed the phenomena, it is the first theory that reveals the physical mechanism behind GAM intermittent excitation and propagation. The preceding work is based on the micro-turbulence associated with toroidal ion temperature gradient mode, and slab-based phenomenological model of zonal flow. When full toroidal effect is introduced into the system, two branches of zonal flow emerge: the torus-modified low frequency zonal flow (TLFZF), and GAM, necessitating a unified exploration of GAM and TLFZF. Indeed, we observe that the transition from the Caviton to Instanton is triggered by a rapid zero-crossing of radial group velocity of drift wave and is found to be strongly correlated with the GAM onset. Many features peculiar to intermittent GAMs, observed in real machines, are thus identified in the numerical experiment. The results will be displayed in figures and in a movie; first for single central rational surface, and then with coupled multiple central rational surfaces. The periodic bursting first shown disappears as being replaced by irregular one, more similar to the intermittent characteristics observed in GAM experiments.
资助项目	National MCF Energy R&D Program of China[2018YFE0311200] ; National MCF Energy R&D Program of China[2017YFE0301204] ; National Natural Science Foundation of China[U1967206] ; National Natural Science Foundation of China[11975231] ; National Natural Science Foundation of China[11805203] ; National Natural Science Foundation of China[11775222] ; Key Research Program of Frontier Science CAS[QYZDB-SSW-SYS004] ; US Dept. of Energy[FG02-04ER-54742]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000616088300001
资助机构	National MCF Energy R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science CAS ; US Dept. of Energy
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/119605]
专题	中国科学院合肥物质科学研究院
通讯作者	LIU, Zhaoyang
作者单位	1.Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA 2.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230026, Peoples R China 4.Sichuan Univ Sci & Engn, Sch Sci, Zigong 643000, Peoples R China
推荐引用方式 GB/T 7714	LIU, Zhaoyang,ZHANG, Yangzhong,MAHAJAN, Swadesh Mitter,et al. The theoretical study on intermittency and propagation of geodesic acoustic mode in L-mode discharge near tokamak edge[J]. PLASMA SCIENCE & TECHNOLOGY,2021,23.
APA	LIU, Zhaoyang.,ZHANG, Yangzhong.,MAHAJAN, Swadesh Mitter.,LIU, Adi.,XIE, Tao.,...&LIU, Wandong.(2021).The theoretical study on intermittency and propagation of geodesic acoustic mode in L-mode discharge near tokamak edge.PLASMA SCIENCE & TECHNOLOGY,23.
MLA	LIU, Zhaoyang,et al."The theoretical study on intermittency and propagation of geodesic acoustic mode in L-mode discharge near tokamak edge".PLASMA SCIENCE & TECHNOLOGY 23(2021).