High resolution charge-exchange spectroscopic measurements of aluminum impurity ions in a high temperature plasma

S.T.A. Kumar, D. J. Den Hartog, B. E. Chapman, Martin O'Mullane, M. Nornberg, D. Craig, S. Eilerman, G. Fiksel, E. Parke, J. Reusch

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Abstract

Charge-exchange recombination spectroscopy, which is generally used to measure low-Z impurities in fusion devices, has been used for measuring Al+11 and Al+13 impurities in the Madison Symmetric Torus reversed field pinch. To obtain the impurity ion temperature, the experimental emission spectrum is fitted with a model which includes fine structure in the atomic transition. Densities of these two ionization states, calculated from charge-exchange emission brightness, are used in combination with a collisional radiative model to estimate the abundance of all other charge states of aluminum in the plasma and the contribution of aluminum to the effective ionic charge of the plasma.


Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPlasma Physics and Controlled Fusion
Volume54
Issue number1
DOIs
Publication statusPublished - Jan 2012
EventSymposium on Celebrating Professor Robert Dewars Accomplishments in Plasma Physics - Atlanta, United States
Duration: 31 Oct 2009 → …

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Keywords

  • torus
  • transport
  • recombination spectroscopy
  • ionization
  • tokamak
  • electrons
  • reversed-field pinch
  • high resolution
  • charge-exchange
  • spectroscopic measurements
  • aluminium impurity
  • ions
  • high temperature
  • plasma

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