Doctoral Dissertations

Abstract

"In separate experiments, the electron-ion recombination rate, Yei, has been measured in CO2 and in mixtures of He, CO2, and N2; and the ion-ion recombination rate, Yii, has been measured in SF6 and in mixtures of SF6 and CH4. The rate constant was determined by analyzing the rising edge of the discharge current pulse. Measurements were made as functions of reduced electric field strength, gas pressure, and gas composition.

In the electron-ion recombination study, Yei in CO2 and in mixtures containing N2 and CO2 was pressure dependent. This dependence is interpreted as due to the separate effects of 2- and 3-body recombination processes. The results indicate that 3-body recombination is dominant at low field strengths for gas pressures above 1 atmosphere, whereas 2-body recombination is dominant at high field strengths. No pressure dependence was observed for mixtures containing He. In such mixtures, 2-body recombination is dominant. The addition of relatively low concentrations of He to the discharge leads to a dramatic change in the bulk recombination rate. Arguments are presented to explain the observation.

In the ion-ion recombination study, Yii was, in general, independent of pressure over the range of this study. Yii was mixture dependent and decreased with increasing reduced electric field strength. When Yii for the mixtures of SF6 and CH4 was plotted as a function of an effective ion temperature, Teff, it showed that for Teff ≥ 450°K, Yii obeyed a simple power law. Arguments are presented to explain this behavior"-- Abstract, pp. ii-iii

Advisor(s)

Littlewood, Ian M.

Committee Member(s)

Peacher, Jerry
Schearer, Laird D., -1993
Alexander, Ralph William, Jr.
Penico, Anthony J., 1923-2011

Department(s)

Physics

Degree Name

Ph. D. in Physics

Publisher

University of Missouri--Rolla

Publication Date

Fall 1986

Pagination

vii, 122 pages

Note about bibliography

Includes bibliographical references (pages 107-110)

Rights

© 1986 Michael Corbin Cornell, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 5444

Print OCLC #

16398707

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