Measurement of electron particle transport coefficients in different operational modes of DⅢ-D

摘要

Electron transport coefficients have been obtained for different operational modes on the DⅢ-D tokamak. The operational modes are: double null diverted(DND)low confinement (L mode), DND high confinement(H mode)without edge localized modes(ELM-free), single null diverted(SND)ELM-free H mode and pumped SND ELMing H mode. Various values of plasma current and safety factor(q)profiles were investigated. For the L mode and ELMing H mode, the coefficients were obtained by a modulated puff of deuterium gas at edge. For the ELM-free modes, the coefficients were obtained by analysing the temporal evolution of the electron density profile imme- diately after the L-H transition.