Impact of pellet injection on extension of the operational region in LHD

摘要

Pellet injection has used as a primary fuelling scheme in the Large Helical Device. With pellet injection, the operational region of NBI plasmas has been extended to higher densities While maintaining a favourable dependence of energy confinement of density, and several important Several important Values, such as plasma stored energy of 0.88 MJ, energy confinement time of 0.3s,β of 2.4% at 1.3T And density of 1.1×10~20m~-3, have been achieved.