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Spatially Resolved Absorption Spectroscopy on a Microhollow Cathode Helium Plasma Using a Vertical-Cavity Surface-Emitting Laser

Kakeru TORII, Shota YAMAWAKI, Koichi KATAYAMA, Shinichi NAMBA¹⁾, Keisuke FUJII, Taiichi SHIKAMA and Masahiro HASUO

Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8540, Japan

1)

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

(Received 25 November 2014 / Accepted 16 February 2015 / Published 26 May 2015)

Abstract

For the 1s2p(¹P) → 1s3d(¹D) transition at 667.815 nm of helium in a microhollow cathode plasma with a 300 µm diameter, we measured the absorption spectra with spatial resolution of 30 µm using a vertical-cavity surface-emitting laser diode. The spectra observed near the electrode at 10 kPa gas pressure showed asymmetry. By analyzing the observed spectra with Voigt functions including the DC Stark effect, we evaluated the gas temperature, electron density, electric field strength and 1s2p(¹P) atom density and produced their two-dimensional maps.

Copyright (c) 2015 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

helium absorption spectra, laser spectroscopy, vertical-cavity surface-emitting laser, microhollow cathode plasma, spatially resolved measurement, gas temperature, electron density, electric field

DOI: 10.1585/pfr.10.3406063

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References

• [1] D. Mariotti and R.M. Sankaran, J. Phys. D: Appl. Phys. 44, 174023 (2011).
• [2] S. Namba, T. Yamasaki, Y. Hane, D. Fukuhara et al., J. Appl. Phys. 110, 073307 (2011).
• [3] J. Wang, S.T. Sanders, J.B. Jeffries and R.K. Hanson, Appl. Phys. B 72, 865 (2001).
• [4] S.T. Sanders, J. Wang, J.B. Jeffries and R.K. Hanson, Appl. Opt. 40, 4404 (2001).
• [5] N. Miura and J. Hopwood, J. Appl. Phys. 109, 013304 (2011).
• [6] M.J. Kushner, J. Phys. D: Appl. Phys. 38, 1633 (2005).
• [7] T. Fujimoto, Plasma Spectroscopy (Clarendon press, Oxford, 2004).
• [8] W.L. Wiese and J.R. Fuhr, J. Phys. Chem. Ref. Data 38, 565 (2009).
• [9] A.G. Frank, V.P. Gavrilenko, N.P. Kyrie and E. Oks, J. Phys. B: At. Mol. Opt. Phys. 39, 5119 (2006).
• [10] A. Atiola, B.C. Gibson-Wilde, A.C. Lindsay et al., J. Phys. B: At. Mol. Opt. Phys. 21, 249 (1988).
• [11] H.R. Griem, Plasma Spectroscopy (McGraw-Hill, New York, 1964).
• [12] A. Thorne, U. Litzen and S. Johansson, Spectrophysics Principles and Applications (Springer, 1999).

This paper may be cited as follows:

Kakeru TORII, Shota YAMAWAKI, Koichi KATAYAMA, Shinichi NAMBA, Keisuke FUJII, Taiichi SHIKAMA and Masahiro HASUO, Plasma Fusion Res. 10, 3406063 (2015).