Electron Production, Electron Attachment, and Charge Recombination Process in High Pressure Gas Discharges.

摘要

Electron transport parameters for gaseous mixtures containing electro-negative gases in buffer gases were investigated in this research program. Absolute electron attachment rate constants and cross sections of halogen compounds were measured. Photodetachment cross sections of halogen negative ions in discharge media were determined. Discharge current switching induced by laser irradiation of discharge media was observed. These basic data are obtained for the development of various gaseous discharge switches and for the study of basic discharge phenomena as well. High repetition-rate discharge switches, opening switches, and radiation or e-beam controlled switches are needed for the development of high power lasers, fusion experiments, magnetic energy storage systems, and particle beam experiments. High pressure gaseous discharges could be used for the development of these switches. The measured electron transport parameters are needed for determining the rise and decay times of discharge pulses, discharge stability, discharge uniformity, and current density. (rrh)