Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma

doi:10.1088/1674-1056/22/12/125201

Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (12): 125201-125201.doi: 10.1088/1674-1056/22/12/125201

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

Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma

崔学武, 崔正英, 冯北滨, 潘宇东, 周航宇, 孙平, 傅炳忠, 卢平, 董云波, 高金明, 宋绍栋, 杨青巍

Southwestern Institute of Physics, Chengdu 610041, China

收稿日期:2013-04-30 修回日期:2013-06-08 出版日期:2013-10-25 发布日期:2013-10-25
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10975048, 11175061, and 10975049).

Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma

Southwestern Institute of Physics, Chengdu 610041, China

Received:2013-04-30 Revised:2013-06-08 Online:2013-10-25 Published:2013-10-25
Contact: Cui Xue-Wu E-mail:cuixw@swip.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10975048, 11175061, and 10975049).

摘要/Abstract

摘要： In this paper, we describe the behavior of impurity transport in the HL-2A electron cyclotron resonance heating (ECRH) L-mode plasma. The neon as a trace impurity is injected by the supersonic molecular beam injection (SMBI) technique, which is used for the first time to study the impurity transport in HL-2A. The progression of neon ions is monitored by the soft X-ray camera and bolometer arrays with good temporal and spatial resolutions. The convection and diffusion process of the neon ions are investigated with the one-dimensional impurity transport code STRAHL. The results show that the diffusion coefficient D of neon ions is a factor of four larger than the neoclassical value in the central region. The value of D is larger in the outer region of the plasma (ρ > 0.6) than in the central region of the plasma (ρ < 0.6). The convective velocity directs inwards with a value of ～-1.0 m/s in the Ohmic discharge, but it reverses to direct outwards with a value of ～ 8.0 m/s in the outer region of the plasma when ECRH is applied. The result indicates that the impurity transport is strongly enhanced with ECRH.

关键词: impurity transport, impurity injection, SMBI, numerical simulation

Abstract: In this paper, we describe the behavior of impurity transport in the HL-2A electron cyclotron resonance heating (ECRH) L-mode plasma. The neon as a trace impurity is injected by the supersonic molecular beam injection (SMBI) technique, which is used for the first time to study the impurity transport in HL-2A. The progression of neon ions is monitored by the soft X-ray camera and bolometer arrays with good temporal and spatial resolutions. The convection and diffusion process of the neon ions are investigated with the one-dimensional impurity transport code STRAHL. The results show that the diffusion coefficient D of neon ions is a factor of four larger than the neoclassical value in the central region. The value of D is larger in the outer region of the plasma (ρ > 0.6) than in the central region of the plasma (ρ < 0.6). The convective velocity directs inwards with a value of ～-1.0 m/s in the Ohmic discharge, but it reverses to direct outwards with a value of ～ 8.0 m/s in the outer region of the plasma when ECRH is applied. The result indicates that the impurity transport is strongly enhanced with ECRH.

Key words: impurity transport, impurity injection, SMBI, numerical simulation

中图分类号: (Impurities in plasmas)

52.25.Vy

52.25.Fi (Transport properties) 52.70.Kz (Optical (ultraviolet, visible, infrared) measurements)

崔学武, 崔正英, 冯北滨, 潘宇东, 周航宇, 孙平, 傅炳忠, 卢平, 董云波, 高金明, 宋绍栋, 杨青巍. Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma[J]. Chin. Phys. B, 2013, 22(12): 125201-125201.

Cui Xue-Wu (崔学武), Cui Zheng-Ying (崔正英), Feng Bei-Bin (冯北滨), Pan Yu-Dong (潘宇东), Zhou Hang-Yu (周航宇), Sun Ping (孙平), Fu Bing-Zhong (傅炳忠), Lu Ping (卢平), Dong Yun-Bo (董云波), Gao Jin-Ming (高金明), Song Shao-Dong (宋绍栋), Yang Qing-Wei (杨青巍). Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma[J]. Chin. Phys. B, 2013, 22(12): 125201-125201.

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Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma

Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma

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