Effect of Ne glow discharge on ion density control in LHD

被引：3
作者：
Morita, S [1 ]
Goto, M
Masuzaki, S
Suzuki, H
Tanaka, K
Nozato, H
Takeiri, Y
Miyazawa, J
机构：
[1] Natl Inst Fus Sci, Gifu 5095292, Japan
[2] Chubu Univ, Coll Engn, Aichi 4878501, Japan
[3] Osaka Univ, Sci & Technol Ctr Atoms Mol & Ions Controls, Suita, Osaka 5650871, Japan
来源：
PLASMA SCIENCE & TECHNOLOGY | 2004年 / 6卷 / 05期
关键词：
hydrogen recycling; Ne glow discharge; ion density;
D O I：
10.1088/1009-0630/6/5/002
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Neon glow discharge cleaning was firstly attempted in Large Helical Device (LHD) instead of He glow discharge to remove hydrogen neutrals and to control the ion density, n(i). The Ne glow discharge continued for 8 hours overnight after a three-day experiment. At the second night Ha emission became weaker than the emission usually observed in the He glow discharge. A clear reduction of the hydrogen influx was also observed in neutral beam injection (NBI) discharges with Ne puff, whereas the neon recycling was strongly enhanced with appearance of a flat density profile. As a result, the lowest density limit was further reduced down to 0.2 x 10(13) cm(-3). The use of Ar puff formed a peaked density profile with a high T-i of 7 keV.
引用
收藏
页码：2440 / 2444
页数：5
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