Colored Diffuse Mini Jets in Runaway Electrons Preionized Diffuse Discharges

Victor F. Tarasenko, Dmitry V. Beloplotov, Mikhail I. Lomaev

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Optical emission of the nanosecond diffuse discharge initiated by runaway electrons in an inhomogeneous electric field was investigated in a single-pulse and pulse-periodic modes in different gases (air, nitrogen, and argon). The amplitude of voltage pulses, pulse rise time, and interelectrode distance were, respectively, 200 kV, 0.5 ns, and 13 mm for single-pulse mode, and 13 kV, 4 ns, and 2 mm for pulse-periodic mode. In the single-pulse mode, the diffuse mini jets (DMJs) of different colors with lengths up to 7 mm appear near electrodes. Blue DMJs were observed near electrodes with a small radius of curvature made of a stainless steel. Red DMJs were observed near the grounded flat electrode made of aluminum and in the center of discharge gap near a spark channel. It was shown that radiation intensity of DMJs increased with the increase in nitrogen pressure up to 0.4 MPa, but subsequent increase in pressure up to 0.7 MPa led to the decrease in radiation intensity. In the pulse-periodic mode, colored DMJs are observed as well, the size of which was ~1 mm. In this mode, the spectral and amplitude-temporal parameters of the radiation of DMJs have been studied. It was shown that the color of DMJs is determined by the radiation of electrode metal vapors. It was shown that the DMJs originate from the bright spots (explosive centers) on electrodes.

Original languageEnglish
Article number7426365
Pages (from-to)386-392
Number of pages7
JournalIEEE Transactions on Plasma Science
Volume44
Issue number4
DOIs
Publication statusPublished - 1 Apr 2016
Externally publishedYes

Fingerprint

pulses
electrodes
radiant flux density
color
nitrogen
metal vapors
radiation
sparks
light emission
stainless steels
curvature
argon
aluminum
radii
electric fields
air
electric potential
gases

Keywords

  • Cathode and anode spots
  • diffuse mini jets (DMJs)
  • electrode material
  • jets of metal vapor
  • runaway electrons preionized diffuse discharge (REP DD).

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Colored Diffuse Mini Jets in Runaway Electrons Preionized Diffuse Discharges. / Tarasenko, Victor F.; Beloplotov, Dmitry V.; Lomaev, Mikhail I.

In: IEEE Transactions on Plasma Science, Vol. 44, No. 4, 7426365, 01.04.2016, p. 386-392.

Research output: Contribution to journalArticle

Tarasenko, Victor F. ; Beloplotov, Dmitry V. ; Lomaev, Mikhail I. / Colored Diffuse Mini Jets in Runaway Electrons Preionized Diffuse Discharges. In: IEEE Transactions on Plasma Science. 2016 ; Vol. 44, No. 4. pp. 386-392.
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