Theoretical investigation of matching between plasma heating and fuelling in HL-1M machine

In addition to ohmic heating, the auxiliary heating such as ICR, ECR and LHR will be used in HL-1M machine. The pellet injection is considered as a possible method to increase the plasma density. The purpose of this article is to analyse matching problem between heating and fuelling. The condition under which the auxiliary heating is effective depends on the plasma density. The plasma density will be changing during pellet injection. The high plasma temperature resulting from the auxiliary heating affects the rate of pellet ablation. There is an optimum choice for pellet size to match the plasma density and temperature. Finally, the permissible size and the injection frequency of the pellet are also given