Session RP1 - Poster Session VIII.
POSTER session, Thursday afternoon, October 30
Fran Hill Southeast Exhibit Hall, ACC
Ion heating experiment has been extensively carried out in LHD. Using Ne NBI discharges the central ion temperature reached 5keV as a result of the increase in Pi/ni. However, the ion density was dominated by the residual hydrogen. In order to displace the hydrogen to neon, Ne glow discharge cleaning was done. As a result, the ion temperature up to 7keV was obtained in combination of Ar puff. Higher ion temperature was also obtained for C pellet injection. During these discharge a large increment of toroidal rotation was observed. The observed toroidal rotation speed indicated a good correlation with the ion temperature. In the conference, effects of the Ne glow discharge, Ar puff, C impurity pellet and toroidal rotation are discussed.