中国物理B ›› 2016, Vol. 25 ›› Issue (1): 15203-015203.doi: 10.1088/1674-1056/25/1/015203

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Effects of q-profiles of a weak magnetic shear on energetic ion excited q=1 mode in tokamak plasmas

Ze-Yu Li(李泽宇), Xian-Qu Wang(王先驱), Xiao-Gang Wang(王晓钢)   

  1. 1. State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China;
    2. Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    3. Department of Physics, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2015-07-24 修回日期:2015-09-01 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: Xian-Qu Wang E-mail:xianquwang@swjtu.edu.cn
  • 基金资助:
    Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant No. 2014GB107004) and the National Natural Science Foundation of China (Grant Nos. 11575014, 11375053, 11475058, and 11261140326).

Effects of q-profiles of a weak magnetic shear on energetic ion excited q=1 mode in tokamak plasmas

Ze-Yu Li(李泽宇)1, Xian-Qu Wang(王先驱)2, Xiao-Gang Wang(王晓钢)3   

  1. 1. State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China;
    2. Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    3. Department of Physics, Harbin Institute of Technology, Harbin 150001, China
  • Received:2015-07-24 Revised:2015-09-01 Online:2016-01-05 Published:2016-01-05
  • Contact: Xian-Qu Wang E-mail:xianquwang@swjtu.edu.cn
  • Supported by:
    Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant No. 2014GB107004) and the National Natural Science Foundation of China (Grant Nos. 11575014, 11375053, 11475058, and 11261140326).

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摘要： In this paper, we study the effect of safety factor profiles, particularly with a very weak magnetic shear, on the m/n=1 mode excited by energetic ions in tokamak plasmas. It is found that the profile plays a significant role in the onset of the mode, and the thresholds for the instability are also derived. The numerical results for configurations with conventional or reversed non monotonic magnetic shears are discussed. The effects of radial location of rational surfaces, edge q value, and flatness of q-profile on the energetic ion excited mode are further analyzed in detail.

关键词: safety factor profile, magnetohydrodynamics, tokamak, energetic particles

Abstract: In this paper, we study the effect of safety factor profiles, particularly with a very weak magnetic shear, on the m/n=1 mode excited by energetic ions in tokamak plasmas. It is found that the profile plays a significant role in the onset of the mode, and the thresholds for the instability are also derived. The numerical results for configurations with conventional or reversed non monotonic magnetic shears are discussed. The effects of radial location of rational surfaces, edge q value, and flatness of q-profile on the energetic ion excited mode are further analyzed in detail.

Key words: safety factor profile, magnetohydrodynamics, tokamak, energetic particles

中图分类号:  (Tokamaks, spherical tokamaks)

  • 52.55.Fa
52.30.Cv (Magnetohydrodynamics (including electron magnetohydrodynamics)) 89.30.Jj (Nuclear fusion power)