Accession Number : ADA185735

Title :   Theoretical Studies of Kinetic Mechanisms of Negative Ion Formation in Plasmas.

Descriptive Note : Annual rept. 1 Jun 86-31 May 87,

Corporate Author : UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT

Personal Author(s) : Michels, H H

PDF Url : ADA185735

Report Date : Jun 1987

Pagination or Media Count : 42

Abstract : This technical program constitutes a theoretical research investigation of the kinetic mechanisms of negative ion information in plasmas. This study was directed toward elucidating 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. The primary goal of this research program was to identify the most important reactions leading to negative ion production or destruction and to estimate these reactions rates as a function of system parameters such as density, composition and temperature. 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.

Descriptors :   *ION SOURCES, *ANIONS, *PLASMAS(PHYSICS), *DISSOCIATION, DENSITY, GAS SURFACE INTERACTIONS, RATES, KINETICS, QUANTUM THEORY, PARAMETERS, VAPOR PHASES, LIGHT, IONIZATION, THEORY, HYDROGEN, LITHIUM, REACTION KINETICS, MAGNETRONS

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE