Electron Production, Electron Attachment, and Charge Recombination Process in High Pressure Gas Discharges.
Abstract
A parallel-plate drift-tube apparatus was used to investigate the electron transport parameters in high gas pressure. The initial electrons were produced either by irradiation of the cathode with excimer laser photons or by two-photon-ionization of a trace of trimethylamine in high pressure gas. The transient voltage pulses due to electron motion between the electrodes were observed. The plasma decay time and the probability for electron leakage from plasma were measured as a function of the ratio of the initial charge density to the applied field. The shortening of electron conduction pulses by adding electron attaching gases to various buffer gases were investigated. The electron attachment rate constants of 02, N20, and CF4 in N2 as well as H20 in Ar, N2 and CH4 were measured at various gas concentrations and E/N. It is observed that temporary negative ions due to electron attachment to H20 and CF4 are formed. The diffusion coefficients of electrons in Air were measured in the E/N = 30 - 300 Td region. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 17, 1984
- Accession Number
- ADA149535
Entities
People
- L. C. Lee
Organizations
- San Diego State University