has been used in the HL-1 and HL-1M tokamak for the first time.Compared with the conventional fuelling
MBI has the following advantages:the fuelling particles can penetrate deeper and a peak in electron density distribution is formed which improves the confinement. The upper end of density ne for the linear ohmic confinement regime can reach 4 10`19gm-3. The experimental results indicate that MBI is an advanced and simple gas fuelling method for fusion plasma.