Open AccessFluctuation-induced inward particle flux during L–I–H transition on HL-2A tokamak
Author(s) -
Jie Wu,
Tao Lan,
Weixing Ding,
G. Zhuang,
Chongxiu Yu,
M. Xu,
L. Nie,
Jinrong Wu,
Hui Sheng,
W. Chen,
Liming Yu,
J. Cheng,
L.W. Yan,
Tijian Deng,
Hangqi Xu,
Junfeng Zhu,
Sen Zhang,
Wenzhe Mao,
Yi Yu,
Xuan Sun,
A. D. Liu,
Jinlin Xie,
H. Li,
X.R. Duan,
W.D. Liu
Publication year - 2021
Publication title -
nuclear fusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.774
H-Index - 120
eISSN - 1741-4326
pISSN - 0029-5515
DOI - 10.1088/1741-4326/abebec
Subject(s) - tokamak , physics , turbulence , flux (metallurgy) , particle (ecology) , zonal flow (plasma) , particle density , plasma , atomic physics , phase transition , mechanics , condensed matter physics , nuclear physics , materials science , oceanography , metallurgy , geology
The inward particle flux associated with the global long-lived mode (LLM) during the L–I–H transition on HL-2A tokamak has been measured. The inward particle flux arises from the phase change between density and radial velocity fluctuations, where density and velocity fluctuations are strongly correlated with magnetic fluctuations of LLM. Moreover, the radial velocity and its gradient rather than poloidal flow shear play an important role in particle transport associated with the large-scale mode. The strong nonlinear coupling between LLM and ambient turbulence has been confirmed, and this may contribute to most of the inward particle flux in the LLM during the I-phase state.
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