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. Tarasenko, G. S. Evtushenko, M. I. Lomaev

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)371-375
Number of pages5
JournalAtmospheric and Oceanic Optics
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Jul 2016

Keywords

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

ASJC Scopus subject areas

  • Oceanography
  • Atomic and Molecular Physics, and Optics
  • Earth-Surface Processes
  • Atmospheric Science

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