Fluctuation-induced inward particle flux during L–I–H transition on HL-2A tokamak

Nuclear Fushion

article

J. Wu¹  T. Lan¹  W.X. Ding¹  G. Zhuang¹  C.X. Yu¹  M. Xu²  L. Nie²  J.R. Wu¹  H.G. Sheng¹  W. Chen²  L.M. Yu²  J. Cheng³  L.W. Yan²  T.J. Deng¹  H.Q. Xu¹  J.F. Zhu¹  S. Zhang¹  W.Z. Mao¹  Y. Yu¹  X. Sun¹  A.D. Liu¹  J.L. Xie¹  H. Li¹  X.R. Duan²  W.D. Liu¹ 

[1] Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China;Southwestern Institute of Physics;Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University

关键词: inward particle flux;    long-lived mode;    nonlinear interaction;    radial velocitygradient;   

DOI  :  10.1088/1741-4326/abebec

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

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.

【 授权许可】

Unknown