Accession Number:

ADA083222

Title:

Plasma Chemistry Processes in the Closed Cycle EDL.

Descriptive Note:

Final rept. 5 Jul 78-5 Jul 79,

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC HUNTSVILLE AL HUNTSVILLE RESEARCH AND ENGINEERING CENTER

Personal Author(s):

Report Date:

1979-07-01

Pagination or Media Count:

161.0

Abstract:

Theoretical modeling of plasma chemistry effects on the performance of closed cycle, pulsed, electron beam sustained electric discharge lasers is described. The one-dimensional model considers the mutual interaction of the electron beam, the discharge, the plasma and laser radiation. The most important processes are modeled in terms of experimentally controllable parameters which include the post-foil electron beam current density, primary electron energy, applied electric potential, electrode spacing, initial gas composition, temperature and pressure, electron beam and discharge pulse width, and laser cavity characteristics. Results obtained for several laser gas mixtures are described and compared with experimental data. A detailed analysis has been made of test cases for closed cycle devices under development, including the effect on performance of variations in the electric field, the electron beam current, and the gas mixture composition. Electrophilic plasma by-products have been identified, and recommendations have been developed for experimental efforts to verify the predictions. Author

Subject Categories:

  • Lasers and Masers
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE