Wendelstein 7-AS (WT-AS) pertains to an advanced helical stellarator. A new felling method, the supersonic molecular beam injection (SMBI, named Gas Jet in Germany)system was installed in WT-AS in May 2001 as a cooperation research item cosupported by the National Nature Science Foundation of China and the Max-Planck Institute of Plasma Physics,Garching, Germany. The experiments of the gas jet with hydrogen or deuterium on WT-AS were implemented. The experimental results exhibit the following features such as high fitellln~ ef-ficiency, stable high-density plasmas and reduction of the recycling fluxes from the vessel wall during injection. These crucial points show that the new fuelling method can be applied to long and stable discharges.
YAO Lianghua FENG Beibing CHEN Chengyuan SHI Zhongbing YUAN Baoshan XIAO Weiwen ZHOU Yan SUN Hongjuan LU Jie DUAN Xuru PAN Yudong HONG Wenyu LI Wei RAN Hong DING Xuantong LIU Yong
