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Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 51
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
P
ulsed discharges in high-pressure gases are of considerable interest as
sources of non-equilibrium plasma for various technological applications:
pollution control, pumping of laser media, plasma assisted combustion, etc.
Discharge development in gap configurations with non-uniform distributions of
electric field, such as point-plane or point-point gaps, typically proceeds via the
prebreakdown stage of formation near the stressed electrode and propagation of
ionization waves – streamers inside the gap. In conditions when the steepness
of applied voltage front is not high, streamers are formed nearly at inception
voltages, as thin plasma filaments. The growth of front steepness supplies
conditions when streamer formation occurs at strong overvoltages, resulting
in generation of wide plasma channels. Such produced plasma structures,
similar to glow discharges, are of special interest to applications due to quasi-
uniformity of plasma parameters in relatively large gas volumes. The specific
features of fast ionization waves, besides large discharge width, are very high
propagation velocities, approaching the speed of light and large currents, up to
several hundred Amps. In this report, recent results of computational study of fast
(subnanosecond) discharge formation are reviewed. On the basis of comparison
of simulation results and experimental data the effects of various factors (voltage
rise time, polarity, geometry of discharge gap, etc.) on discharge characteristics
are revealed. The major physical phenomena governing the properties of fast
discharges are analyzed.
Biography
George V Naidis is Principal researcher at the Joint Institute
for High Temperatures of the Russian Academy of Sciences.
He received his BS degree in Physics from the Moscow State
University in 1969, and the CSc (PhD) and Doctor of Science
degrees in Plasma Physics and Chemistry from the Joint Insti-
tute for High Temperatures in 1977 and 1993, respectively. His
research interests include Physical and Chemical Kinetics of
Low-Temperature Plasma, Physics Of Gas Discharges, Plasma
Medicine. He has published about 130 refereed journal papers
and reviews.
gnaidis@mail.ruModeling of fast discharges in high-pressure gases
George V Naidis and Natalia Yu Babaeva
Joint Institute for High Temperatures RAS, Russia
George V Naidis et al., Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-001