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核工业西南物理研究院 ›› 2025, Vol. 45 ›› Issue (2): 227-234.DOI: 10.16568/j.0254-6086.202502015

• 等离子体物理 • 上一篇    下一篇

等离子体压强和环向旋转对电阻内扭曲模的线性增长率影响

楚家璇1,杨锦宏*1,任珍珍2,肖  政1,张培杰1,邝  俊1,汪卫华1   

  1. (1. 安徽大学物质科学与信息技术研究院,合肥 230601;2. 安徽大学物理与光电工程学院,合肥 230601)
  • 收稿日期:2023-10-17 修回日期:2024-07-08 出版日期:2025-06-15 发布日期:2025-06-13
  • 通讯作者: 杨锦宏(1977-),男,安徽桐城人,硕士研究生导师,从事等离子体数值模拟研究。
  • 作者简介:楚家璇(1998-),男,河南禹州人,硕士研究生,从事等离子体数值模拟研究。
  • 基金资助:
    国家磁约束核聚变能发展计划(2022YFE03040002);国家重点项目(2019YFE03050002);国家自然科学基金(12005003);安徽省教育厅自然科学重点项目(KJ2021A1429)

The effects of plasma pressure and toroidal rotation on the linear growth rate of resistive internal kink modes

CHU Jia-Xuan1, YANG Jin-hong1, REN Zhen-zhen2, XIAO Zheng1, ZHANG Pei-jie1, KUANG Jun1, WANG Wei-hua1   

  1. (1. Institute of Material Science and Information Technology, Anhui University, Hefei 230601; 2. School of Physics and Optoelectronic Engineering, Anhui University, Hefei 230601)

  • Received:2023-10-17 Revised:2024-07-08 Online:2025-06-15 Published:2025-06-13

摘要:

利用三维环形非线性磁流体代码CLT,数值研究了等离子体压强及环向旋转对电阻性内扭曲模(RIKM)线性增长率的影响。结果表明:(1) RIKM线性增长率随q=1有理面等离子体压强的增大而减小(致稳),随该处压强梯度增大而增大(解稳)。因此,对于一般的等离子体压强剖面分布,在致稳与解稳因素共同作用下,存在一个临界比压值使得RIKM线性增长率最小。(2) 压强分布峰化度越大,临界比压越小。当压强分布峰化度较小时,临界比压消失。(3) 当等离子体比压低时,环向旋转对RIKM线性增长率抑制效果越显著,随着等离子体比压增大,环向旋转对RIKM影响降低。

关键词: 等离子体比压, 电阻性内扭曲模, 环向旋转, 压强梯度

Abstract:

Using the three-dimensional toroidal nonlinear magnetohydrodynamic code CLT, the influence of plasma pressure and toroidal rotation on the linear growth rate of resistive internal kink mode (RIKM) was numerically investigated. The results show that: (1) The linear growth rate of RIKM decreases (stabilizes) with the increase of plasma pressure at the rational surface q=1, or increases (destabilizes) with the increase of pressure gradient at that location. Therefore, for general plasma pressure profiles, there exists a  QUOTE βcrit value that minimizes the linear growth rate of RIKM, taking into account the combined effects of stabilization and destabilization factors. (2) The larger the peak degree of the pressure distribution, the smaller the βcrit value. When the peak degree of the pressure distribution is small, the βcrit value disappears. (3) When the plasma β is low, the effect of toroidal rotation in suppressing the linear growth rate of RIKM is more significant. As the plasma β increases, the influence of toroidal rotation on RIKM decreases.

Key words: Plasma β, Resistive internal kink mode, Toroidal rotation, Pressure gradient

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