Error estimation and parameter dependence of the calculation of the fast ion distribution function, temperature, and density using data from the KF1 high energy neutral particle analyzer on Joint European Torus

Christian Schlatter, Duccio Testa, Marco Cecconello, Andrea Murari, Marko Santala

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3 Citations (Scopus)


Joint European Torus high energy neutral particle analyzer measures the flux of fast neutrals originating from the plasma core. From this data, the fast ion distribution function fifast, temperature Ti,⊥fast, and density nifastare derived using knowledge of various plasma parameters and of the cross section for the required atomic processes. In this article, a systematic sensitivity study of the effect of uncertainties in these quantities on the evaluation of the neutral particle analyzer ffifast, Ti,⊥fast, and nifastis reported. The dominant parameter affecting nifastis the impurity confinement time and therefore a reasonable estimate of this quantity is necessary to reduce the uncertainties in nifastbelow 50%. On the other hand, Ti,⊥fastis much less sensitive and can certainly be provided with an accuracy of better than 10%. © 2004 American Institute of Physics.
Original languageEnglish
Pages (from-to)3547 - 3549
Number of pages3
JournalReview of Scientific Instruments
Issue number10 II
Publication statusPublished - Oct 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

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