文献类型：期刊文献

英文题名：Effects of the energetic particles on the anomalous transport driven by the ion temperature gradient instability

作者：Yang, Yueting[1];Liu, Mengru[1];Zhou, Cuizhi[1];Li, Hourui[1];Zhang, Debing[1]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2022

卷号：29

期号：8

外文期刊名：PHYSICS OF PLASMAS

收录：;EI(收录号：20223612690483);WOS:【SCI-EXPANDED(收录号:WOS:000842009700003)】；

基金：One of the authors, D. Zhang, thanks Professor H. Ren in University of Science and Technology of China for his helpful discussion. This work was supported by the National Natural Science Foundation of China under Grant No. 12005063, the National MCF Energy R & D Program of China under Grant No. 2019YFE03060000, and the Undergraduate Training Program on Innovation and Entrepreneurship under Grant No. X202110251336.

语种：英文

外文关键词：Charge transfer - Ions - Thermal gradients

摘要：When the charge exchange time (tau(cx)) is sufficiently shorter than the slowing-down time (tau(sl)), the distribution of energetic particles (EPs) is bump-on-tail. In this work, the effects of EPs on the anomalous transport driven by the ion temperature gradient (ITG) instability are investigated. The dispersion relation is theoretically derived and numerically solved to analyze the effects of EPs on the linear frequency of ITG instability. Two kinds of bump-on-tail distribution, denoted by tau = 1/3 tau(sl)/tau(cx) = 1.133 and 6.8, and the slowing-down distribution, denoted by tau = 0, are considered. Based on the linear results, the quasilinear particle and energy fluxes of bulk ions are analyzed. It is found that effects of the EPs on the ITG linear frequency and quasilinear transport are obvious in the regions with the EPs initial energy E-0/T-e < 60 and the EPs charge concentration Z(h)epsilon(h) > 0.01, where T-e is the electron temperature, Z(h) and epsilon h are the charge number and fraction of EPs, respectively. Existence of the EPs is beneficial for the stabilization of ITG instability. Moreover, the ITG instability can be better stabilized with the bump-on-tail distribution of energetic deuterium (D) and the slowing-down distribution of energetic helium (He). However, in the cases with the slowing-down distribution of D and the bump-on-tail distribution of He, the particle fluxes of bulk ions are inwardly largest and the energy fluxes of bulk ions are outwardly smallest, which indicate that the better particle and energy confinement appear with the slowing-down distribution of D and the bump-on-tail distribution of He. Published under an exclusive license by AIP Publishing.