Study of plasma-Wall Interactions in Divertor Simulator

点击翻译按钮获取中文摘要

(1) Control of Plasma Heat Flow to Target Plate in Divertor Plasma Simulators.Finding of Density Threshold for Plasma DetachmentExperimental and analytical finding of density threshold to obtain a detached plasma. The reason comes from the electron energy loss channel through the e-i energy exchange.Clear Observation of Recombination Process in Detached PlasmasVisible continuum as well as a series of He Balmer spectral lines shows consistently a partial local thermoequilibrium with the plasma temperature of 0.1-0.3eV for detached recombining plasmas.Demonstration of Recombination-dependent partial Flux to the TargetTemporal change in electron temperature has been obtained by the modulated discharge current. The particle flux to the target was found to be very sensitively dependent of T_e on the recombinations rate proportional to T_e^<-4.5>.Effect of Thermo-and Secondary Electron Emissions to Plasma Heat Flow to the TargetThe suppression of the sheath voltage and the enhancement of the plasma heat flow to the target plate are clearly found due to the thermo-and secondary electron emission form the plate(2) 2D Fluid Simulation on the Plasma Detachment(3) Ion Cyclotron Wave Heating in the Divertor Simulator