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Atmospheric and Oceanic Optics

, Volume 29, Issue 4, pp 371–375 | Cite as

Laser monitor visualization of gas-dynamic processes under pulse-periodic discharges initiated by runaway electrons in atmospheric pressure air

  • D. V. Beloplotov
  • M. V. Trigub
  • V. F. TarasenkoEmail author
  • G. S. Evtushenko
  • M. I. LomaevEmail author
Optical Sources and Receivers for Environmental Studies

Abstract

Gas-dynamic processes that run in pulse-periodic discharges initiated by runaway electrons in atmospheric pressure air are studied with CuBr-laser based laser monitor and schlieren method. Voltage pulses (U = 13 kV, FWHM is 10 ns, front length is 4 ns, negative polarity, f = 60–3200 Hz) applied to a coneshaped copper cathode with cone base diameter, apex angle, and corner radius of cone vertex of 6 mm, 30°, and 0.2 mm, respectively. A flat copper anode was located at a distance of 2 mm from the cathode. It is established that discharge plasma products with copper vapors are carried in a radial direction along the anode surface to a distance of 24 mm for 2.5 ms. The temperature of the gas heated is ~1 × 103 K. It is shown that the use of the laser monitor in transmitted light provides for contrast images of optical inhomogeneities that appear in gas discharges.

Keywords

nanosecond pulse-periodic discharge atmospheric pressure air runaway electrons schlieren technique laser monitor copper bromide laser metal vapor jets colored minijets 

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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  1. 1.Institute of High Current Electronics, Siberian BranchRussian Academy of SciencesTomskRussia
  2. 2.V.E. Zuev Institute of Atmospheric Optics, Siberian BranchRussian Academy of SciencesTomskRussia
  3. 3.Tomsk Polytechnical UniversityTomskRussia

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