Comparison of Supersonic Molecular Beam Injection from both low field side and high field side of HL-2A

YAO Lianghua (姚良骅); ZHAO Dawei (赵大为); FENG Beibin (冯北滨); CHEN.Chengyuan (陈程远); ZHOU Yan(周艳); HAN Xiaoyu (韩晓玉); LI Yonggao (李永高); Jerome BUCALOSSI; Duan Xuru (段旭如)

Plasma Science and Technology > 2010 > 12(5): 529-534.

YAO Lianghua (姚良骅), ZHAO Dawei (赵大为), FENG Beibin (冯北滨), CHEN.Chengyuan (陈程远), ZHOU Yan(周艳), HAN Xiaoyu (韩晓玉), LI Yonggao (李永高), Jerome BUCALOSSI, Duan Xuru (段旭如). Comparison of Supersonic Molecular Beam Injection from both low field side and high field side of HL-2A[J]. Plasma Science and Technology, 2010, 12(5): 529-534.

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Comparison of Supersonic Molecular Beam Injection from both low field side and high field side of HL-2A

1 Southwestern Institute of Physics, Chengdu 610041, China 2 University of Electronic Science and Technology of China, Chengdu 610054, China 3 Institute of Magnetic Fusion Research, CEA, Cadarache 13108, France

Funds: Supported by National Natural Science Foundation of China (Nos. 10675043, 10975049)

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Abstract

Abstract

SMBI (supersonic molecular beam injection), as an effective fueling method for fusion plasmas, has been widely used on the HL-2A tokamak and other fusion devices. Two different types of SMBI system are now installed on HL-2A. One is an electromagnetic valve injector on the low field side (LFS), and the other is a pneumatic valve injector on the high field side (HFS). A new electron density record, which exceeds both the Greenwald density limit and the maximum density obtained by gas puffing (GP), was obtained on HL-2A with single-null-divertor operation. The HFS injection system is still under test, however, its outstanding fueling characteristics have already been observed, e.g. it has higher fueling efficiency compared to the LFS system. This excellent feature is still preserved during the process of ECRH.
- HL-2A tokamak,
- SMBI,
- fuelling

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