Non-equilibrium studies in switching arc plasmas in Japan

Y. Tanaka, K. Tomita, Y. Inada, A. Kumada, K. Hidaka, T. Fujino, K. Suzuki, T. Shinkaig

Research output: Contribution to conferencePaperpeer-review


This paper briefly introduce research work examples of non-equilibrium studies in switching arcs. In understanding arc behavior, one often assumes local thermodynamic equilibrium (LTE) condition in the arc plasma. However, actual arc plasmas are not completely and not always in LTE state because of strong temperature change temporally and spatially, and high electric field application etc. Recently, we have a collaboration work in numerical simulations and experimental approaches for decaying arcs without LTE assumption. First, our numerical model is presented for decaying arcs without chemical equilibrium assumption. Secondly, two experimental methods are introduced for measuring electron density in decaying arcs without LTE assumption: Laser Thomson Scattering method and the Schack-Hartmann method. Finally, comparison results is shown between the LTE simulation, the chemically non-equilibrium simulation, and the above experimental measurements.

Original languageEnglish
Number of pages9
Publication statusPublished - 2017
Event22nd Symposium on Physics of Switching Arc, 2017 - Nove Mesto na Morave, Czech Republic
Duration: Sept 4 2017Sept 8 2017


Other22nd Symposium on Physics of Switching Arc, 2017
Country/TerritoryCzech Republic
CityNove Mesto na Morave

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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