旋转磁岛对捕获快离子输运影响的研究

doi:10.16568/j.0254-6086.202401013

核工业西南物理研究院 ›› 2024, Vol. 44 ›› Issue (1): 78-84.DOI: 10.16568/j.0254-6086.202401013

旋转磁岛对捕获快离子输运影响的研究

赵建华1，曹锦佳*1，向东1，戴勇智1，杨骏辉1，赵佳蔚1，杨文军2

(1. 南华大学核科学技术学院，衡阳 421001；2. 南华大学电气工程学院，衡阳 421001)

收稿日期:2022-04-06 修回日期:2023-09-19 出版日期:2024-03-15 发布日期:2024-03-14
通讯作者: 曹锦佳(1983-)，男，湖南长沙人，副教授，硕士研究生导师，从事聚变等离子体物理理论研究。
作者简介:赵建华(1995-)，女，安徽淮北人，硕士研究生，从事聚变等离子体物理理论研究。
基金资助:
科技部ITER专项(2022YFE03080002)；国家自然科学基金(11605088、12005100)；湖南省教育厅重点基金项目(20A417)；湖南省自然科学基金(2017JJ3268)；湖南省国际合作基地项目(2018WK4009)；衡阳市科学技术发展计划(2018KJ108)；南华大学博士启动基金(2017XQD08)

Effects of rotating magnetic island on the transport of trapped fast ions

ZHAO Jian-hua1, CAO Jin-jia1, XIANG Dong1, DAI Yong-zhi1, YANG Jun-hui1, ZHAO Jia-wei1, YANG Wen-jun2

(1. School of Nuclear Science and Technology, University of South China, Hengyang 421001; 2. School of Electrical Engineering, University of South China, Hengyang 421001)

Received:2022-04-06 Revised:2023-09-19 Online:2024-03-15 Published:2024-03-14

摘要/Abstract

摘要： 采用漂移动理学理论，研究了旋转磁岛与捕获快离子的反弹运动和进动频率(包括极向进动和螺旋进动)之间共振引起的快离子输运。求解捕获离子香蕉轨道回旋心动理学方程，获得了共振和非共振情况下的快离子分布函数。计算了磁漂移、电漂移和磁岛旋转产生的快离子输运通量。与极向角周期性相关的磁漂移和电漂移产生的输运在磁岛分界线附近存在强烈的流剪切，在磁岛靠近等离子体边界一侧输运向内；磁岛旋转诱发的输运则与磁漂移和电漂移产生的输运相反，在磁岛靠近等离子体边界一侧输运沿径向向外，并起主要作用。当磁岛宽度大于某一阈值岛宽时，捕获快离子输运增长缓慢，趋于饱和。

关键词: 捕获快离子, 旋转磁岛, 极向进动, 共振, 输运

Abstract: The transport of fast ions caused by the resonance between the rotating magnetic island and the bounce and precession frequencies (including precessions in poloidal and helical directions) of trapped fast ions is studied within the drift kinetic framework. The fast ion distribution functions in resonant and non-resonant cases are obtained by solving the banana orbital gyrocenter equation of trapped ion. The fast ion transport fluxes generated by magnetic drift, electric drift, and magnetic island rotation are calculated. The transport generated by magnetic and electric drifts, which are related to motions in the poloidal direction, has strong flow shear near the boundary of magnetic island, and is transported inward in the right-hand side of magnetic island. The transport induced by magnetic island rotation is opposite to the transport caused by magnetic and electric drifts, and the transport is radially outward on the side of the magnetic island near the plasma boundary and plays a dominant role. When the magnetic island width is greater than a certain threshold, the transport of fast trapped ions increases slowly and tends to saturation.

Key words: Trapped fast ions, Magnetic island rotation, Poloidal precession, Resonance, Transport

中图分类号:

TL65+2

赵建华, 曹锦佳, 向东, 戴勇智, 杨骏辉, 赵佳蔚, 杨文军. 旋转磁岛对捕获快离子输运影响的研究[J]. 核工业西南物理研究院, 2024, 44(1): 78-84.

ZHAO Jian-hua, CAO Jin-jia, XIANG Dong, DAI Yong-zhi, YANG Jun-hui, ZHAO Jia-wei, YANG Wen-jun. Effects of rotating magnetic island on the transport of trapped fast ions[J]. Nuclear Fusion and Plasma Physics, 2024, 44(1): 78-84.

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旋转磁岛对捕获快离子输运影响的研究

Effects of rotating magnetic island on the transport of trapped fast ions

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