Initial stage of breakdown of a point-plane gap filled with high-pressure nitrogen and SF6

D. V. Beloplotov, M. I. Lomaev, D. A. Sorokin, V. F. Tarasenko

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The initial stage of breakdown of sulfur hexafluoride (SF6) and nitrogen in a nonuniform electric field at high pressures is studied. High voltage pulses with amplitudes of up to 350 kV have been applied across the discharge gap with the “point-plane” geometry of the electrodes. Experimental results on the dynamics of light emission from different zones of the discharge gap can be explained by generation of an ionization wave, which started from a potential electrode with a small radius of curvature. It is found that the speed of the ionization wave front in nitrogen and SF6 is higher in the second half of the discharge gap as compared to the first one. It is shown that the speed of ionization wave front decreases as SF6 and nitrogen pressure increases. The average speed of ionization wave front is shown to be ∼2 cm/ns in SF6 under a pressure of 0.25 MPa and ∼3.6 cm/ns in nitrogen under a pressure of 0.3 MPa under the negative polarity of high-voltage pulses when bridging a discharge gap of about 13 mm.

Original languageEnglish
Pages (from-to)324-328
Number of pages5
JournalAtmospheric and Oceanic Optics
Volume27
Issue number4
DOIs
Publication statusPublished - 1 Jul 2014
Externally publishedYes

Fingerprint

ionization
wave fronts
breakdown
nitrogen
high voltages
electrode
sulfur hexafluoride
electrodes
pulses
curvature
light emission
electric field
polarity
sulfur
geometry
radii
electric fields
speed

Keywords

  • elevated pressure
  • ionization wave
  • nitrogen
  • nonuniform electric field
  • sulfur hexafluoride

ASJC Scopus subject areas

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

Cite this

Initial stage of breakdown of a point-plane gap filled with high-pressure nitrogen and SF6. / Beloplotov, D. V.; Lomaev, M. I.; Sorokin, D. A.; Tarasenko, V. F.

In: Atmospheric and Oceanic Optics, Vol. 27, No. 4, 01.07.2014, p. 324-328.

Research output: Contribution to journalArticle

Beloplotov, D. V. ; Lomaev, M. I. ; Sorokin, D. A. ; Tarasenko, V. F. / Initial stage of breakdown of a point-plane gap filled with high-pressure nitrogen and SF6. In: Atmospheric and Oceanic Optics. 2014 ; Vol. 27, No. 4. pp. 324-328.
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