Keywords and Phrases
Dielectric Barrier Discharge; Filaments; Light Intensity; Metamaterials; Needle; Plasma
"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.
Rovey, Joshua L.
Castano Giraldo, Carlos Henry
Mechanical and Aerospace Engineering
M.S. in Aerospace Engineering
Missouri University of Science and Technology. Department of Mechanical and Aerospace Engineering
Missouri University of Science and Technology
ix, 40 pages
© 2016 Matthew Crawford Paliwoda, All rights reserved.
Thesis - Open Access
Electronic OCLC #
Paliwoda, Matthew Crawford, "Intensity control of dielectric barrier discharge filaments" (2016). Masters Theses. 7565.