[Table of Contents]

Plasma and Fusion Research

Volume 5, S1040 (2010)

Regular Articles

Simultaneous Measurement of Electron and Ion Temperatures with Helium-like Argon X-Ray Spectrum
Motoshi GOTO and Shigeru MORITA
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 6 February 2009 / Accepted 22 May 2009 / Published 26 March 2010)


Helium-like argon spectra are measured for plasmas in the Large Helical Device (LHD). The electron temperature Te derived from the intensity ratio of a dielectronic satellite line (1 s2 2p 2P1/2 - 1s2p2 2D3/2) to the resonance line (1 s2 1S0 - 1s2p 1P1) is consistent with the central Te measured with the Thomson scattering method when the electron density ne has a peaked profile. The ion temperature Ti is simultaneously determined from the Doppler broadening width of the resonance line and an establishment of thermal equilibrium between electrons and ions, i.e., Ti = Te, due to increase of ne is experimentally confirmed. The density ratio of lithium-like ion to helium-like ion is determined from fitting of the entire spectrum.


X-ray spectroscopy, helium-like argon, dielectronic satellite line, electron temperature measurement, ion temperature measurement

DOI: 10.1585/pfr.5.S1040


  • [1] S. Morita et al., Rev. Sci. Instrum. 74, 2375 (2003).
  • [2] M. Bitter, Phys. Rev. Lett. 43, 129 (1979).
  • [3] M. Bitter, Phys. Rev. Lett. 91, 265001 (2003).
  • [4] A.H. Gabriel, Mon. Not. R. astr. Soc. 160, 99 (1972).
  • [5] O. Marchuk, Ph. D. thesis (2004).

This paper may be cited as follows:

Motoshi GOTO and Shigeru MORITA, Plasma Fusion Res. 5, S1040 (2010).