Masters Theses

Keywords and Phrases

Dielectric Barrier Discharge; Filaments; Light Intensity; Metamaterials; Needle; Plasma

Abstract

"When operated in a filamentary mode, a volume dielectric barrier discharge (DBD) is known to produce patterned plasma structures. These structures are currently being explored for reconfigurable metamaterial applications. In this work the presence and intensity of a single filament, within an array of filaments, was controlled by adjusting the voltage to that filament's individual needle electrode. The current, voltage, and time-averaged normalized light intensity were measured while varying the voltage of the needle through a self-biasing resistance. For a 7.5 kV, 3.2 kHz DBD in air, the needle-controlled filament intensity varies from that of the surrounding filaments to zero measurable light intensity. The total bias on the needle does not exceed 7 % of the driving voltage. Analysis of an electrostatic field model showed that the varying intensity filament does not produce light when the curve of the electric field along the filament centerline is below the curve of the electric field along the centerline of an adjacent unbiased filament. Surface charge interaction, on the dielectric barrier furthest from the needle electrode, is the mechanism that extinguishes the filament while the applied electric field is above the dielectric strength of air. The light intensity was calculated as the total charge transferred across the filament. The total charge was estimated from the simulation model and varies with the measured light intensity"--Abstract, page iii.

Advisor(s)

Rovey, Joshua L.

Committee Member(s)

Yang, Xiaodong
Castano, Carlos H.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Aerospace Engineering

Sponsor(s)

Missouri University of Science and Technology. Department of Mechanical and Aerospace Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2016

Pagination

ix, 40 pages

Note about bibliography

Includes bibliographic references (pages 34-39).

Rights

© 2016 Matthew Crawford Paliwoda, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Dielectric devices
Plasma devices
Electric fields
Metamaterials

Thesis Number

T 10975

Electronic OCLC #

958293908

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