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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 106
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
A
pokamp discharge is the potential pulsed-periodic discharge, forming a plasma jet propagating transversely to discharge
channel. This report provides an overview of laboratory measurements of apokamp characteristics. It is established
experimentally that this regime of pulse-periodic discharge is formed stage by stage. At the first stage, in a microsecond discharge
of a voltage pulse of positive polarity, a potential spark channel formed during the first pulses between two needle electrodes is
transformed into a diffuse channel. At the second stage, a weakly glowing halo is formed near the discharge channel, and a bright
offshoot arises near channel. Finally, the offshoot becomes a source of plasma bullets (streamers) moving with a velocity of up to
200 km/s. The measured values are in good agreement with the results of numerical simulation of streamer in air at atmospheric
pressure. It is shown that the formation of a jet significantly depends on the air temperature. It is established that apokamp
discharge in air at pressures that corresponds to the middle and upper atmosphere of the earth is miniature analogous to a large-
scale transient luminous events-blue jets and sprites, namely, the velocities of propagation of apokamps are about the velocities
of propagation of starters and blue jets in the atmosphere of the Earth. It was shown that jets (apokamps) with the maximum
length are observed in the pressure range corresponding to the altitudes of appearance and propagation of starters and blue jets.
In addition, by means of scaling law for gas discharge we estimate experimentally the electrical field strength at altitudes, which
corresponds to the formation of blue jets in the middle earth atmosphere. Estimated value lies in a range of 6·10
5
-1.9·10
6
V/m
which confirms the correct use of streamer model to describe the physical nature of apokamp and blue jets.
badik@loi.hcei.tsc.ruApokamp discharge phenomenon: laboratory
studies and unexpected application for
atmospheric physics
Eduard A Sosnin
1,2
and Victor F Tarasenko
1,2
1
Institute of High Current Electronics (IHCE SB RAS), Russia
2
National Research Tomsk State University, Russia
Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-003