中文版 | English
Title

Dependence of nonlinear coupling among turbulence, geodesic acoustic modes and tearing modes on magnetic island width in the HL-2A edge plasmas

Author
Corresponding AuthorLi,J. C.
Publication Years
2022-12-01
DOI
Source Title
ISSN
0029-5515
EISSN
1741-4326
Volume62Issue:12
Abstract
Statistical spectral features of the dependence of geodesic acoustic modes (GAMs) and their nonlinear couplings with ambient turbulence on the magnetic island (MI) width (W) in the edge region of HL-2A tokamak plasmas are analyzed. Experimental observations have indicated that the modulation influence as well as the strength of nonlinear interactions between GAMs and turbulence generally shows a gradual decay while the couplings between MIs and the latter are increased simultaneously as the MI becomes larger. The MIs mainly reduce the couplings between GAMs and potential fluctuations, whereas the changes in the nonlinear interactions between density fluctuations and MIs are more evident. Moreover, it is found that there exists a nonmonotonic relationship between the turbulence correlation length and island width, in which it exhibits a minimum around W ∼ 3.7 cm, suggesting that the MI around such a scale would have a significant suppression effect on turbulent transport. These findings promote the understanding of the nonlinear interactions between MIs and turbulence in the edge of fusion plasmas.
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Language
English
SUSTech Authorship
Corresponding
WOS Accession No
WOS:000868885700001
ESI Research Field
PHYSICS
Scopus EID
2-s2.0-85140089600
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406887
DepartmentDepartment of Earth and Space Sciences
Affiliation
1.Southwestern Institute of Physics,Chengdu,PO Box 432,610041,China
2.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.School of Physics,Nankai University,Tianjin,300071,China
4.University of California,Irvine,92697,United States
Corresponding Author AffilicationDepartment of Earth and Space Sciences
Recommended Citation
GB/T 7714
Xu,J. Q.,Li,J. C.,Peng,X. D.,et al. Dependence of nonlinear coupling among turbulence, geodesic acoustic modes and tearing modes on magnetic island width in the HL-2A edge plasmas[J]. NUCLEAR FUSION,2022,62(12).
APA
Xu,J. Q..,Li,J. C..,Peng,X. D..,Qu,Y. R..,Lin,Z..,...&Xu,M..(2022).Dependence of nonlinear coupling among turbulence, geodesic acoustic modes and tearing modes on magnetic island width in the HL-2A edge plasmas.NUCLEAR FUSION,62(12).
MLA
Xu,J. Q.,et al."Dependence of nonlinear coupling among turbulence, geodesic acoustic modes and tearing modes on magnetic island width in the HL-2A edge plasmas".NUCLEAR FUSION 62.12(2022).
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