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Investigation of a single barrier discharge in submillimeter air gaps. Nonuniform field

Authors
  • Bondarenko, P. N.1
  • Emel’yanov, O. A.1
  • Shemet, M. V.1
  • 1 St. Petersburg State Technical University, Politekhnicheskaya ul. 29, St. Petersburg, 195251, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Technical Physics
Publisher
Pleiades Publishing
Publication Date
Aug 15, 2014
Volume
59
Issue
8
Pages
1127–1135
Identifiers
DOI: 10.1134/S1063784214080064
Source
Springer Nature
Keywords
License
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Abstract

Pulse characteristics of single barrier discharges as well as parameters of charges accumulated on the surface of a dielectric under the atmospheric pressure in the “needle-(0.1–2.0)-mm air gap-polymer barrier-plane” system are investigated. It is found experimentally that for the positive polarity of the needle, the voltage for the discharge initiation is higher than in the case of the negative polarity by ∼25–35%. The reversal of the needle polarity from negative to positive increases the amplitude of the discharge current and the accumulated surface charge by ∼1.5–3 times. For the positive polarity of the needle, the discharge is governed by a streamer mechanism, while for the negative polarity, the discharge is initiated by the formation of a single Trichel pulse. The single pulse regime is observed for the discharge current up to a certain electrode gap dCR. For the positive needle and for air gap width dair > dCR ≈ 1.5 mm, a multipulse burst corona is formed, while for the negative needle and dair > dCR ≈ 0.9 mm, a damped sequence of Trichel pulses evolves in the system.

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