Static and dynamic behaviour of plasma detachment in the divertor simulator experiment NAGDS-II

摘要

A comprehensive investigation has been performed of the static and dynamic behaviour of detached recombining plasmas in the linear divertor plasma simulator NAGDIS-II. For stationary plasma detachment, the transition from electron-ion recombination (EIR) to molecular activated recombination (MAR) has been observed by injecting hydrogen gas into high density helium plasmas. The particle loss rate due to MAR is found to be comparable to that of EIR. Experiments have also Been performed by the injection of a plasma heat pulse produced by RF heating into the detached Helium plasma to demonstrate the dynamic behaviour of volumetric plasma recombination.