Plasma and Fusion Research

Volume 12, 1202036 (2017)

Rapid Communications

Central Deuteron Temperature Derived from Total Neutron Emission Rate in Electron Cyclotron Heated LHD Plasmas
Kunihiro OGAWA1,2), Mitsutaka ISOBE1,2), Takeo NISHITANI1), Hiroki KAWASE2), Neng PU2) and LHD Experiment Group
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki-city, Gifu 509-5292, Japan
2)
SOKENDAI, Toki-city, Gifu 509-5292, Japan
(Received 6 June 2017 / Accepted 2 August 2017 / Published 13 September 2017)

Abstract

Total neutron emission rate from Large Helical Device plasmas is measured by using a neutron flux monitor newly installed for deuterium operations. Deuteron temperature is derived from the total neutron emission rates in electron cyclotron heated Large Helical Device plasmas. Time evolution of central deuteron temperature obtained by the neutron flux monitor approximately agrees with central impurity ion temperature measured by the EUV spectrometer.

Keywords

neutron diagnostics, total neutron emission rate, deuteron temperature, LHD

DOI: 10.1585/pfr.12.1202036

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References

  • [1] Y. Takeiri et al., “Extension of Operational Regime of LHD towards Deuterium Experiment” in Proceedings of 26th IAEA Fusion Energy Conference, Kyoto, Japan, 17-22 October (2016).
  • [2] K.M. Young et al., Plasma Phys. Control. Fusion 26, 11 (1984).
  • [3] O.N. Jarvis, Plasma Phys. Control. Fusion 36, 209 (1994).
  • [4] C.L. Fiore and R.L. Boivin, Rev. Sci. Instrum. 66, 945 (1995).
  • [5] S. Besshou et al., Nucl. Instrum. Methods A237, 590 (1985).
  • [6] M. Isobe et al., Rev. Sci. Instrum. 68, 532 (1997).
  • [7] M. Isobe et al., Rev. Sci. Instrum. 85, 11E114 (2014).
  • [8] X. Huang et al., Plasma Fusion Res. 10, 3402036 (2015).
  • [9] H.S. Bosch and G.M. Hale, Nucl. Fusion 32, 611 (1992).
  • [10] S.P. Hirshman and J.C. Whitson, Phys. Fluids 26, 3353 (1983).