[Table of Contents]

Plasma and Fusion Research

Volume 6, 2406054 (2011)

Regular Articles

Two-Dimensional Spatial Temperature and Density Measurements in an Arcjet Plasma Expanding through a Slit Nozzle
Kazuki KOZUE, Shogo NAKAMITSU, Shinichi NAMBA, Takuma ENDO, Ken TAKIYAMA, Kuninori SATO1) and Naoki TAMURA1)
Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8527, Japan
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
(Received 23 December 2010 / Accepted 17 February 2011 / Published 27 July 2011)

Abstract

To directly observe an arcjet inside the plasma discharge section, we developed an arcjet plasma device having a converging and diverging slit nozzle. Spectroscopic observations in the directions parallel and perpendicular to the plasma expansion axis were made to examine the characteristics of the arcjet plasma inside the nozzle. Intense continuum spectra due to bremsstrahlung were observed at visible and infrared wavelengths, from which the two-dimensional spatial distribution of the electron temperature was obtained. In addition, the electron density was determined by using the Stark broadening spectrum; the result indicated that high-density plasma was generated in the nozzle.

Keywords

arcjet plasma, plasma spectroscopy, atomic and molecular processes, electron temperature measurement, electron density measurement

DOI: 10.1585/pfr.6.2406054

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This paper may be cited as follows:

Kazuki KOZUE, Shogo NAKAMITSU, Shinichi NAMBA, Takuma ENDO, Ken TAKIYAMA, Kuninori SATO and Naoki TAMURA, Plasma Fusion Res. 6, 2406054 (2011).