[Table of Contents]

Plasma and Fusion Research

Volume 6, 2403029 (2011)

Regular Articles

Effect of Radiation Power Loss due to Impurity Gas Puff on Divertor Plasma
Izumi MURAKAMI, Daiji KATO, Hiroyuki A. SAKAUE and Suguru MASUZAKI
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 27 December 2010 / Accepted 28 February 2011 / Published 1 July 2011)

Abstract

In order to examine the effect of radiation power loss due to impurity gas puff in divertor plasma, we calculated time evolution of impurity ion densities and electron temperature for several cases with Ne gas puff rates 1012 and 1013 cm−3 s−1 during 0.01 s and initial electron temperature 10-300 eV for a plasma with electron density 1013 cm−3 with a one zone model. We found that the electron temperature decreases less than 1 eV for the cases with gas puff rate 1013 cm−3 s−1, independent of initial electron temperature and in this case we expect plasma detachment. Detailed conditions for plasma detachment should also depend on time history of radiation power.

Keywords

gas divertor, radiation power loss, Ne, atomic process

DOI: 10.1585/pfr.6.2403029

Full Text

PDF format (1.6Mbytes) PDF Download

References

  • [1] A. Sagara et al., Fusion Eng. Des. 83, 1690 (2008).
  • [2] D.E. Post, J. Nucl. Mater. 220-222, 143 (1995).
  • [3] D.E. Post, N. Putvinskaya, F.W. Perkins and W. Nevins, J. Nucl. Mater. 220-222, 1014 (1995).
  • [4] D.E. Post, J. Abdallah and R.E. Clark, N. Putvinskaya, Phys. Plasmas 2, 2328 (1995).
  • [5] M.E. Rensink and T.D. Rognlien, LLNL Report, UCRLID-124702 (1996).
  • [6] M.E. Rensink, T.D. Rognlilen and D.D. Hua, LLNL Report, UCRL-ID-124702-1 (1997).
  • [7] Y. Suzuki et al., Contrib. Plasma Phys. 48, 169 (2008).
  • [8] G.S. Voronov, Atomic Data Nucl. Data Tables 65, 1 (1997).
  • [9] P. Mazzotta et al., Astron. Astrophys. Suppl. 133, 403 (1998).
  • [10] D.A. Verner, http://www.pa.uky.edu/˜verner/fortran.html (1999).
  • [11] H.P. Summers, The ADAS User Manual, version 2.6, http://www.adas.ac.uk (2004).

This paper may be cited as follows:

Izumi MURAKAMI, Daiji KATO, Hiroyuki A. SAKAUE and Suguru MASUZAKI, Plasma Fusion Res. 6, 2403029 (2011).