[Table of Contents]

Plasma and Fusion Research

Volume 2, S1075 (2007)

Regular Articles

Analysis of Energy Spectra of Fast Ion in the Large Helical Device
Hidetoshi NISHIMURA, Mitsutaka ISOBE1), Masaki NISHIURA1), Mamiko SASAO, Akio KOMORI1) and LHD experimental group
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
1)
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 7 December 2006 / Accepted 12 March 2007 / Published 20 November 2007)

Abstract

On the basis of kinetic description, the analytical formula is derived as an evaluation formula of the energy spectra of fast ion produced by neutral beam injection (NBI) heating. The effects of particle loss due to the loss cone are newly considered in the kinetic equation. The distribution function is derived by integrating the kinetic transport equation as possible as analytical methods. Thus it will be able to reduce a computational time for the systematic analysis of the energy spectra of fast ion. The validity of the derived solution is appraised by comparing with the energy spectra experimentally measured by natural diamond detector (NDD) in the Large Helical Device (LHD). Good agreements in their behavior are obtained.

Keywords

fast ion, orbit loss, neutral beam injection heating, Large Helical Device, natural diamond detector

DOI: 10.1585/pfr.2.S1075

Full Text

PDF format (572Kbytes) PDF Download

References

  • [1] S. Murakami et al., Nucl. Fusion 40, 693 (2000).
  • [2] J.G. Cordey and W.G.F. Core, Phys. Fluids 17, 1626 (1974).
  • [3] J.D. Gaffey, J. Plasma Phys. 16, 149 (1976).
  • [4] M. Isobe et al., Rev. Sci. Instrum. 72, 611 (2001).
  • [5] T. Saida et al., Nucl. Fusion 44, 488 (2004).
  • [6] H. Sanuki et al., Phys. Fluids B 2, (9), 2155 (1990).
  • [7] T. Saida, Doctor Thesis of Tohoku University (2004).
  • [8] M.N. Rosenbluth et al., Phy. Rev. 107, 1 (1957).
  • [9] H. Yamada et al., Plasma Phys. Control. Fusion 43, A55 (2001).
  • [10] S. Murakami, J. Plasma Fusion Res. 80, (9), 725 (2004).

This paper may be cited as follows:

Hidetoshi NISHIMURA, Mitsutaka ISOBE, Masaki NISHIURA, Mamiko SASAO, Akio KOMORI and LHD experimental group , Plasma Fusion Res. 2, S1075 (2007).