Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration

doi:10.1088/1674-1056/26/6/065201

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 65201-065201.doi: 10.1088/1674-1056/26/6/065201

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

Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration

Xueke Wu(吴雪科), Huidong Li(李会东), Zhanhui Wang(王占辉), Hao Feng(冯灏), Yulin Zhou(周雨林)

1 School of Science, Xihua University, Chengdu 610039, China;
2 Southwestern Institute of Physics, Chengdu 610041, China

收稿日期:2016-11-05 修回日期:2017-03-13 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: Huidong Li, Zhanhui Wang E-mail:huidongli888@163.com;zhwang@swip.ac.cn
基金资助:
Project supported by the National Natural Science Foundation for Young Scientists of China (Grant No. 11605143), the Undergraduate Training Programs for Innovation and Entrepreneurship of Sichuan Province, China (Grant No. 05020732), the National Natural Science Foundation of China (Grant No. 11575055), the Fund from the Department of Education in Sichuan Province of China (Grant No. 15ZB0129), the China National Magnetic Confinement Fusion Science Program (Grant No. 2013GB107001), the National ITER Program of China (Contract No. 2014GB113000), and the Funds of the Youth Innovation Team of Science and Technology in Sichuan Province of China (Grant No. 2014TD0023).

Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration

Xueke Wu(吴雪科)¹, Huidong Li(李会东)¹, Zhanhui Wang(王占辉)², Hao Feng(冯灏)¹, Yulin Zhou(周雨林)²

1 School of Science, Xihua University, Chengdu 610039, China;
2 Southwestern Institute of Physics, Chengdu 610041, China

Received:2016-11-05 Revised:2017-03-13 Online:2017-06-05 Published:2017-06-05
Contact: Huidong Li, Zhanhui Wang E-mail:huidongli888@163.com;zhwang@swip.ac.cn
Supported by:
Project supported by the National Natural Science Foundation for Young Scientists of China (Grant No. 11605143), the Undergraduate Training Programs for Innovation and Entrepreneurship of Sichuan Province, China (Grant No. 05020732), the National Natural Science Foundation of China (Grant No. 11575055), the Fund from the Department of Education in Sichuan Province of China (Grant No. 15ZB0129), the China National Magnetic Confinement Fusion Science Program (Grant No. 2013GB107001), the National ITER Program of China (Contract No. 2014GB113000), and the Funds of the Youth Innovation Team of Science and Technology in Sichuan Province of China (Grant No. 2014TD0023).

摘要/Abstract

摘要： Using the trans-neut module of the BOUT++ code, we study how the fueling penetration depth of supersonic molecular beam injection (SMBI) is affected by plasma density and temperature profiles. The plasma densities and temperatures in L-mode are initialized to be a set of linear profiles with different core plasma densities and temperatures. The plasma profiles are relaxed to a set of steady states with different core plasma densities or temperatures. For a fixed gradient, the steady profiles are characterized by the core plasma density and temperature. The SMBI is investigated based on the final steady profiles with different core plasma densities or temperatures. The simulated results suggest that the SMB injection will be blocked by dense core plasma and high-temperature plasma. Once the core plasma density is set to be N_i0=1.4N₀ (N₀=1×10¹⁹ m^-3) it produces a deeper penetration depth. When N_i0 is increased from 1.4N₀ to 3.9N₀ at intervals of 0.8N₀, keeping a constant core temperature of T_e0=725 eV at the radial position of ψ=0.65}, the penetration depth gradually decreases. Meanwhile, when the density is fixed at N_i0=1.4N₀ and the core plasma temperature T_e0 is set to 365 eV, the penetration depth increases. The penetration depth decreases as T_e0 is increased from 365 eV to 2759 eV. Sufficiently large N_i0 or T_e0 causes most of the injected molecules to stay in the scrape-off-layer (SOL) region, lowering the fueling efficiency.

关键词: tokamak, plasma fueling, SMBI, penetration depth, HL-2A

Abstract: Using the trans-neut module of the BOUT++ code, we study how the fueling penetration depth of supersonic molecular beam injection (SMBI) is affected by plasma density and temperature profiles. The plasma densities and temperatures in L-mode are initialized to be a set of linear profiles with different core plasma densities and temperatures. The plasma profiles are relaxed to a set of steady states with different core plasma densities or temperatures. For a fixed gradient, the steady profiles are characterized by the core plasma density and temperature. The SMBI is investigated based on the final steady profiles with different core plasma densities or temperatures. The simulated results suggest that the SMB injection will be blocked by dense core plasma and high-temperature plasma. Once the core plasma density is set to be N_i0=1.4N₀ (N₀=1×10¹⁹ m^-3) it produces a deeper penetration depth. When N_i0 is increased from 1.4N₀ to 3.9N₀ at intervals of 0.8N₀, keeping a constant core temperature of T_e0=725 eV at the radial position of ψ=0.65}, the penetration depth gradually decreases. Meanwhile, when the density is fixed at N_i0=1.4N₀ and the core plasma temperature T_e0 is set to 365 eV, the penetration depth increases. The penetration depth decreases as T_e0 is increased from 365 eV to 2759 eV. Sufficiently large N_i0 or T_e0 causes most of the injected molecules to stay in the scrape-off-layer (SOL) region, lowering the fueling efficiency.

Key words: tokamak, plasma fueling, SMBI, penetration depth, HL-2A

中图分类号: (Transport properties)

52.25.Fi

52.25.Ya (Neutrals in plasmas)

吴雪科, 李会东, 王占辉, 冯灏, 周雨林. Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration[J]. 中国物理B, 2017, 26(6): 65201-065201.

Xueke Wu(吴雪科), Huidong Li(李会东), Zhanhui Wang(王占辉), Hao Feng(冯灏), Yulin Zhou(周雨林). Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration[J]. Chin. Phys. B, 2017, 26(6): 65201-065201.

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Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration

Simulations of the effects of density and temperature profile on SMBI penetration depth based on the HL-2A tokamak configuration

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