Selective modulation of plasma parameters in an atmospheric dielectricbarrier discharge driven by sawtooth-type tailored voltage waveforms

Tailored voltage waveforms, formed by a fundamental frequency waveform superimposed withhigher harmonics, show promise in realizing independent control and optimization of plasmaparameters in conventional atmospheric dielectric barrier discharge systems (DBDs). Inthis paper, a self-consistent fluid...

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Bibliographic Details
Published in:Physics of plasmas 2020-06, Vol.27 (6)
Main Authors: Wang, Z, Lim J W M
Format: Article
Language:English
Subjects:
Dielectric barrier discharge
Electric potential
Electron emission
Electron energy
Higher harmonics
Modulation
Optimization
Parameters
Plasma
Plasma physics
Resonant frequencies
Voltage
Waveforms
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Summary:Tailored voltage waveforms, formed by a fundamental frequency waveform superimposed withhigher harmonics, show promise in realizing independent control and optimization of plasmaparameters in conventional atmospheric dielectric barrier discharge systems (DBDs). Inthis paper, a self-consistent fluid model developed by a semi-kinetic treatment ofelectrons is applied to study the dependency of the electron energy and densitydistributions on the number of applied higher harmonics, applied fundamental frequency,and contributions from secondary electron emission—in a DBD system driven by tailoredvoltage waveforms. The mechanisms for achieving selective control over the modulatedparameters are proposed, which allow for optimal selection of applied parameters forvarious downstream applications. This work exhibits dual-advantages for its novelty inpresenting practical methods to modulate atmospheric plasma parameters, while in-depthanalysis and discussions reveal underlying theoretical principles for the modulation ofplasma parameters in atmospheric pressure discharges driven by tailored voltagewaveforms.
ISSN:1070-664X
1089-7674