Plasma and Fusion Research

Volume 16, 1202013 (2021)

Rapid Communications

Doppler and Stark Broadenings of He II Emission in NAGDIS-PG
Shin KAJITA, Takaya NAKAMORI1), Hirohiko TANAKA1), Yusuke KIKUCHI2) and Noriyasu OHNO1)
Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
1)
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
2)
Graduate School of Engineering, University of Hyogo, Hyogo 671-2280, Japan
(Received 20 December 2020 / Accepted 5 January 2021 / Published 19 February 2021)

Abstract

Time evolutions of the emission from helium (He) ion at 468.6 nm were observed in the magnetized co-axial plasma gun device NAGDIS-PG, and the broadening of the spectrum was analyzed in terms of Doppler and Stark broadenings to deduce the ion temperature and the electron density. A significant broadening of the He II spectrum was identified around a dip in the discharge current, suggesting that increases in the temperature and density occurred.

Keywords

plasma gun, spectroscopy, Doppler broadening, Stark broadening

DOI: 10.1585/pfr.16.1202013

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References

  • [1] G. Federici, A. Loarte and G. Strohmayer, Plasma Phys. Control. Fusion 45, 1523 (2003).
  • [2] I. Garkusha, I. Landman, J. Linke, V. Makhlaj, A. Medvedev, S. Malykhin, S. Peschanyi, G. Pintsuk, A. Pugachev and V. Tereshin, J. Nucl. Mater. 415, S65 (2011).
  • [3] Y. Kikuchi, I. Sakuma, Y. Asai, K. Onishi, W. Isono, T. Nakazono, M. Nakane, N. Fukumoto and M. Nagata, Physica Scripta T167, 014065 (2016).
  • [4] M. Yajima, S. Kajita, N. Ohno, S. Masuzaki, N. Yoshida, D.U. Aussems, T.W. Morgan, K. Bystrov and H.V.D. Meiden, Plasma Fusion Res. 15, 1205061 (2020).
  • [5] T.W. Morgan, T.M. de Kruif, H.J. van der Meiden, M.A. van den Berg, J. Scholten, W. Melissen, B.J.M. Krijger, S. Bardin and G.D. Temmerman, Plasma Phys. Control. Fusion 56, 095004 (2014).
  • [6] T. Matsumoto, J. Sekiguchi, T. Asai et al., Rev. Sci. Instrum. 87, 053512 (2016).
  • [7] A. Case, S. Messer, R. Bomgardner and F.D. Witherspoon, Phys. Plasmas 17, 053503 (2010).
  • [8] S. Kajita, N. Ohno and S. Takamura, IEEE Trans. Plasma Sci. 41, 1889 (2013).
  • [9] S. Kajita, N. Ohno, T. Akiyama, T. Nihashi, T. Uchiyama, M. Osaka, Y. Kikuchi and M. Nagata, J. Nucl. Mater. 438, S707 (2013).
  • [10] S. Kado and T. Shikama, J. Plasma Fusion Res. 79, 841 (2003).
  • [11] H. Griem, Spectral Line Broadening by Plasmas (Academic Press, Inc., New York, 1974).
  • [12] L. Qi, J. Song, C. Zhao, X. Bai, F. Zhao, H. Yan, C. Ren and D. Wang, Phys. Plasmas 27, 122506 (2020).