Effect of Ne Glow Discharge on Ion Density Control in LHD

被引：0

作者：

S.Morita

M.Goto

S.Masuzak

H.Suzuki

K.Tanaka

H.Nozato

Y.Takeiri

J.Miyazawa

LHD experimental group

机构：

[1] Aichi

[2] Chubu University

[3] College of Engineering

[4] Gifu

[5] Japan

[6] Kasugai 487-8501

[7] Molecules and Ions Controls

[8] National Institute for Fusion Science

[9] Osaka University

[10] Science and Technology Center for Atoms

[11] Suita 565-0871

[12] Toki 509-5292

来源：

Plasma Science & Technology | 2004年 / 05期

关键词：

hydrogen recycling; Ne glow discharge; ion density;

D O I：

暂无

中图分类号：

O461.21 [];

学科分类号：

0809 ; 080901 ;

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;. TheNe glow discharge continued for 8 hours overnight after a three-day experiment. At the secondnight H;emission became weaker than the emission usually observed in the He glow discharge. Aclear reduction of the hydrogen influx was also observed in neutral beam injection （NBI） dischargeswith Ne puff, whereas the neon recycling was strongly enhanced with appearance of a flat densityprofile. As a result, the lowest density limit was further reduced down to 0.2×10～（13） cm～（-3）. Theuse of Ar puff formed a peaked density profile with a high T;of 7 keV.

引用

页码：2440 / 2444

页数：5

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