Thomson scattering diagnostics of decay processes of Ar/SF6 gas-blast arcs confined by a nozzle

Kentaro Tomita, Daisuke Gojima, Kazuhiko Nagai, Kiichiro Uchino, Ryo Kamimae, Yasunori Tanaka, Katsumi Suzuki, Takanori Iijima, Toshiyuki Uchii, Takeshi Shinkai

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Because of its instability, it is difficult to measure precisely the electron density (ne) of a long-gap decaying arc discharge in a circuit breaker. However, it is well known that it is an essential parameter for the determination of success or failure of the current interruption in a circuit breaker. In this paper, the spatiotemporal evolutions of the electron density were successfully measured in decaying SF6 gas-blast arc discharges formed with a long gap (50 mm) in a confined nozzle using laser Thomson scattering. Pure Ar gas and an 80%Ar/20%SF6 mixture gas were used as the arc quenching media at atmospheric pressure. After reducing the current to zero, both the measured ne and arc radius in the Ar/SF6 gas arc clearly decayed more rapidly than in the pure Ar gas arc.

Original languageEnglish
Article number382001
JournalJournal of Physics D: Applied Physics
Volume46
Issue number38
DOIs
Publication statusPublished - Sep 25 2013

Fingerprint

Thomson scattering
blasts
nozzles
Nozzles
arcs
Gases
Scattering
circuit breakers
arc discharges
Electric circuit breakers
decay
gases
Carrier concentration
interruption
Gas mixtures
Discharge (fluid mechanics)
Atmospheric pressure
gas mixtures
Quenching
atmospheric pressure

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Thomson scattering diagnostics of decay processes of Ar/SF6 gas-blast arcs confined by a nozzle. / Tomita, Kentaro; Gojima, Daisuke; Nagai, Kazuhiko; Uchino, Kiichiro; Kamimae, Ryo; Tanaka, Yasunori; Suzuki, Katsumi; Iijima, Takanori; Uchii, Toshiyuki; Shinkai, Takeshi.

In: Journal of Physics D: Applied Physics, Vol. 46, No. 38, 382001, 25.09.2013.

Research output: Contribution to journalArticle

Tomita, Kentaro ; Gojima, Daisuke ; Nagai, Kazuhiko ; Uchino, Kiichiro ; Kamimae, Ryo ; Tanaka, Yasunori ; Suzuki, Katsumi ; Iijima, Takanori ; Uchii, Toshiyuki ; Shinkai, Takeshi. / Thomson scattering diagnostics of decay processes of Ar/SF6 gas-blast arcs confined by a nozzle. In: Journal of Physics D: Applied Physics. 2013 ; Vol. 46, No. 38.
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AU - Suzuki, Katsumi

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