Spectroscopic Observation of He Arcjet Plasma Expanding Through a Converging and Diverging Slit Nozzle

Authors

  • Kazuki Kozue Hiroshima University
  • Shinichi Namba Hiroshima University
  • Takuma Endo Hiroshima University
  • Ken Takiyama Hiroshima University
  • Naoki Tamura National Institute for Fusion Science

DOI:

https://doi.org/10.4186/ej.2013.17.5.7

Keywords:

arcjet plasma, slit nozzle, plasma spectroscopy

Abstract

An arcjet plasma generator with a converging and diverging slit nozzle was constructed. This plasma source allowed us to directly observe the arc plasma in the discharge section, which provided useful information about a transition from ionizing thermal plasma to recombining phase. Spatial distributions of the electron temperature and density in the rectangular shaped anode nozzle were evaluated by visible emission spectroscopy. The temperature and density for a discharge current of 20 A were determined to be 0.18 eV and 3.7×1013 cm-3, respectively, at the nozzle throat. The values on the jet axis were compared with those calculated by the gas dynamic theory on one dimensional slit nozzle.

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Author Biographies

Kazuki Kozue

Graduate school of Engineering, Hiroshima University, 1-4-1 Higashi-Hiroshima, Hiroshima 739-8527, Japan

Shinichi Namba

Graduate school of Engineering, Hiroshima University, 1-4-1 Higashi-Hiroshima, Hiroshima 739-8527, Japan

Takuma Endo

Graduate school of Engineering, Hiroshima University, 1-4-1 Higashi-Hiroshima, Hiroshima 739-8527, Japan

Ken Takiyama

Graduate school of Engineering, Hiroshima University, 1-4-1 Higashi-Hiroshima, Hiroshima 739-8527, Japan

Naoki Tamura

National Institute for Fusion Science, 322-6 Oroshi-cyo, Toki, Gifu 509-5292, Japan

Published

Vol 17 No 5, Dec 31, 2013

How to Cite

[1]
K. Kozue, S. Namba, T. Endo, K. Takiyama, and N. Tamura, “Spectroscopic Observation of He Arcjet Plasma Expanding Through a Converging and Diverging Slit Nozzle”, Eng. J., vol. 17, no. 5, pp. 7-12, Dec. 2013.