Ion internal transport barrier in neutral beam heated plasmas on HL-2A

D. L. Yu, Y. L. Wei, L. Liu, J. Q. Dong, K. Ida, K. Itoh, A. P. Sun, J. Y. Cao, Z. B. Shi, Z. X. Wang, Y. Xiao, B. S. Yuan, H. R. Du, X. X. He, W. J. Chen, Q. Ma, S. I. Itoh, K. J. Zhao, Y. Zhou, J. WangX. Q. Ji, W. L. Zhong, Y. G. Li, J. M. Gao, W. Deng, Yi Liu, Y. Xu, L. W. Yan, Q. W. Yang, X. T. Ding, X. R. Duan, Yong Liu

研究成果: ジャーナルへの寄稿学術誌査読

29 被引用数 (Scopus)

抄録

Ion internal transport barriers (iITBs) are first observed in neutral beam injection (NBI) heated plasmas at the HL-2A tokamak. The position of the barrier foot, in the stationary state, coincides with the q = 1 surface within its uncertainty of measurement. iITBs can develop more easily at the beginning of NBI heating. Also, iITBs are unstable for the sawtooth plasma. Simulations reveal that the thermal diffusivity of ions (χ i) inside the barrier can be as low as the neoclassical level. It is observed that the flow shear in the stationary iITB state reaches the level required for suppressing the ion temperature gradient mode instability, which indicates the important role of flow shear in sustaining the iITB.

本文言語英語
論文番号056003
ジャーナルNuclear Fusion
56
5
DOI
出版ステータス出版済み - 3月 31 2016

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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