Electrical and Computer Engineering ETDs

Publication Date

Fall 12-17-2022

Abstract

In present photoionization models used in computational studies, there is a lack of experimental data and several assumptions pertaining to photo-electron production in the gas. It is widely accepted that wavelengths between 98 nm and 102.5 nm are the primary contributors to photoionization of oxygen in an air plasma. In air, the collisional kinetics of nitrogen provide the photons, which results in the ionization of oxygen. Photoionization rate measurements from a low current corona discharge in synthetic air mixtures are reported to provide new empirical data. In addition, this provides a method to estimate the scaling parameter w/a. Concurrently, vacuum ultraviolet emission (VUV) emission spectra from a nitrogen corona discharge at pressures from 0.1 – 60 Torr in the wavelength region of 95-105 nm is reported. Identification of the bands reveal the transitions that are photoionizing capable.

Keywords

VUV, spectroscopy, photoionization, corona

Document Type

Dissertation

Language

English

Degree Name

Electrical Engineering

Level of Degree

Doctoral

Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Jane Lehr

Second Committee Member

Mark Gilmore

Third Committee Member

Andrew Fierro

Fourth Committee Member

Mark Johnston

Fifth Committee Member

Adam Hecht

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