Accession Number:

ADA199994

Title:

Theoretical Studies of Kinetic Mechanisms of Negative Ion Formation in Plasmas

Descriptive Note:

Final rept. 1 Jun 1985-31 May 1988

Corporate Author:

UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT

Personal Author(s):

Report Date:

1988-06-01

Pagination or Media Count:

53.0

Abstract:

This technical program constitutes a theoretical research investigation of the kinetic mechanisms of negative ion formation in plasmas. This study was directed toward eluci-dating the mechanisms of the most important volume dependent reactions that occur in hydrogen-ion, H-D- source devices, primarily of the Belchenko-Dimov-Dudnikov BDD type and toward evaluating other light negative anions, such as Li-, as possible sources. A primary goal of this research program was to identify the most important reactions leading to negative ion production or destruction and to estimate these reaction cross sections and product branching ratios. A further goal was to explore new chemical sources for the production of light mass negative atomic ions. The results of this program furnish data and provide direction for more detailed investigations into the kinetics of both gas phase and gas-surface reaction rates of importance in ion source devices and provide input for reliable modeling of such systems. This investigation was carried out using quantum mechanical methods. Both ab initio and density functional approaches were employed in these studies. Keywords Potential energy surfaces, Negative ions, Dissociation attachment, Ion molecule reactions, Hydrogen, Lithium.

Subject Categories:

  • Physical Chemistry
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE