Simulations of the L–H transition dynamics with different heat and particle sources

doi:10.1088/1674-1056/24/11/115204

中国物理B ›› 2015, Vol. 24 ›› Issue (11): 115204-115204.doi: 10.1088/1674-1056/24/11/115204

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

Simulations of the L–H transition dynamics with different heat and particle sources

李会东^a, 王占辉^b, Jan Weiland^c, 冯灏^a, 孙卫国^{a d}

a School of Science, Research Center for Advanced Computation, Xihua University, Chengdu 610039, China;
b Southwestern Institute of Physics, Chengdu 610041, China;
c Department Applied Physics, Chalmers. University of Technology and Euratom-VR Association, S41296 Gothenburg, Sweden;
d Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

收稿日期:2015-04-02 修回日期:2015-07-22 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: Wang Zhan-Hui, Feng Hao E-mail:zhwang@swip.ac.cn;fenghao@mail.xhu.edu.cn
基金资助:
Project supported by the Funds of the Youth Innovation Team of Science and Technology in Sichuan Province, China (Grant No. 2014TD0023), the National Natural Science Foundation of China (Grant Nos. 11447228 and 11205053), and the China National Magnetic Confinement Fusion Science Program (Grant No. 2013GB107001).

Simulations of the L–H transition dynamics with different heat and particle sources

Li Hui-Dong (李会东)^a, Wang Zhan-Hui (王占辉)^b, Jan Weiland^c, Feng Hao (冯灏)^a, Sun Wei-Guo (孙卫国)^{a d}

a School of Science, Research Center for Advanced Computation, Xihua University, Chengdu 610039, China;
b Southwestern Institute of Physics, Chengdu 610041, China;
c Department Applied Physics, Chalmers. University of Technology and Euratom-VR Association, S41296 Gothenburg, Sweden;
d Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

Received:2015-04-02 Revised:2015-07-22 Online:2015-11-05 Published:2015-11-05
Contact: Wang Zhan-Hui, Feng Hao E-mail:zhwang@swip.ac.cn;fenghao@mail.xhu.edu.cn
Supported by:
Project supported by the Funds of the Youth Innovation Team of Science and Technology in Sichuan Province, China (Grant No. 2014TD0023), the National Natural Science Foundation of China (Grant Nos. 11447228 and 11205053), and the China National Magnetic Confinement Fusion Science Program (Grant No. 2013GB107001).

摘要/Abstract

摘要： It is crucial to increase the total stored energy by realizing the transition from a low confinement (L-mode) state to a high confinement (H-mode) state in magnetic confinement fusion. The L-H transition process is simulated by using the predictive transport code based on Weiland’s fluid model. Based on the equilibrium parameters obtained from equilibrium fitting (EFIT) in the experiment, the electron density n_e, electron temperature T_e, ion temperatures T_i, ion poloidal V_p, and toroidal momenta V_t are simulated self-consistently. The L-H transition dynamic behaviors with the formation of the transport barriers of ion and electron temperatures, the electron density, and the ion toroidal momenta are analyzed. During the L-H transition, the strong poloidal flow shear in the edge transport barrier region is observed. The crashes of the electron and ion temperature pedestals are also observed during the L-H transition. The effects of the heating and particle sources on the L-H transition process are studied systematically, and the critical power threshold of the L-H transition is also found.

关键词: magnetic fusion, tokamak plasma, L-H transition, transport barriers

Abstract: It is crucial to increase the total stored energy by realizing the transition from a low confinement (L-mode) state to a high confinement (H-mode) state in magnetic confinement fusion. The L-H transition process is simulated by using the predictive transport code based on Weiland’s fluid model. Based on the equilibrium parameters obtained from equilibrium fitting (EFIT) in the experiment, the electron density n_e, electron temperature T_e, ion temperatures T_i, ion poloidal V_p, and toroidal momenta V_t are simulated self-consistently. The L-H transition dynamic behaviors with the formation of the transport barriers of ion and electron temperatures, the electron density, and the ion toroidal momenta are analyzed. During the L-H transition, the strong poloidal flow shear in the edge transport barrier region is observed. The crashes of the electron and ion temperature pedestals are also observed during the L-H transition. The effects of the heating and particle sources on the L-H transition process are studied systematically, and the critical power threshold of the L-H transition is also found.

Key words: magnetic fusion, tokamak plasma, L-H transition, transport barriers

中图分类号: (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))

52.35.Py

52.70.La (X-ray and γ-ray measurements) 52.55.Tn (Ideal and resistive MHD modes; kinetic modes) 52.55.Fa (Tokamaks, spherical tokamaks)

李会东, 王占辉, Jan Weiland, 冯灏, 孙卫国. Simulations of the L–H transition dynamics with different heat and particle sources[J]. 中国物理B, 2015, 24(11): 115204-115204.

Li Hui-Dong (李会东), Wang Zhan-Hui (王占辉), Jan Weiland, Feng Hao (冯灏), Sun Wei-Guo (孙卫国). Simulations of the L–H transition dynamics with different heat and particle sources[J]. Chin. Phys. B, 2015, 24(11): 115204-115204.

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Simulations of the L–H transition dynamics with different heat and particle sources

Simulations of the L–H transition dynamics with different heat and particle sources

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