| 1 | Effect of Ne Glow Discharge on Ion Density Control in LHD显示文摘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, hi. 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) dischargeswith 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 0.2×10^13 cm^-3. Theuse of Ar puff formed a peaked density profile with a high Ti of 7 keV. | S.Morita M.Goto S.Masuzak H.Suzuki K.Tanaka H.Nozato Y.Takeiri J.Miyazawa LHD experimental group | 2004 | Plasma Science and Technology2004，6，5： | 0 |
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