Investigation of Electron Attachment and Dissociation Rates in C2F6/CH4 Electric Gas Discharges.
Abstract
This investigation determined the attachment and dissociation rates of the electronegative gas, C2F6, in a buffer gas of methane, Ch4, at atmospheric pressure when undergoing electron-beam sustained gas discharges. A non-linear least-squares fit of the electron lifetime equation to the decay portion of the discharge current pulse indicates an attachment rate of 500,000/sec for a gas mixture ratio of 1/7550, C2F6/CH4 and an E/N range of 3 to 13 Townsend. Results of the curve fit were inconclusive for E/N below 3 Townsend due to the effects of a slowly decaying electron-beam. Attempts were made to measure the dissociation rate of C2F6 as a function of discharge time for a ratio of E/N equal to 13 Townsend using a residual gas analyzer. The actual dissociation rate was not determined. However, it was confirmed that the dissociation of C2F6 due to the electron-beam ionization pulses and the corresponding gas discharge was not significant in large closed-cycle gas flow loops as proposed for pulsed power switching if E/N is held below 13 Townsend. Originator supplied keywords include: Electron-beam, Attachment, Recombination, Perfluorocarbons, Switch, Cathode-fall, Cross section, Plasma, Gaseous discharge, Electron, Electric, Dissociation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA151796
Entities
People
- V. R. Wilson
Organizations
- Air Force Institute of Technology