Plasma Physics Reports

, Volume 41, Issue 12, pp 983–989 | Cite as

Specific features of measuring the isotopic composition of hydrogen ions in ITER plasma by using neutral particle diagnostics under neutral beam injection conditions

  • V. I. Afanasyev
  • P. R. Goncharov
  • M. I. Mironov
  • V. G. Nesenevich
  • M. P. Petrov
  • S. Ya. Petrov
  • V. Yu. Sergeev
Tokamaks
  • 45 Downloads

Abstract

Results of numerical simulation of signals from neutral particle analyzers under injection of the heating and diagnostic neutral beams in different operating modes of the ITER tokamak are presented. The distribution functions of fast ions in plasma are simulated, and the corresponding neutral particle fluxes escaping from the plasma along the line of sight of the analyzers are calculated. It is shown that the injection of heating deuterium (D0) beams results in the appearance of an intense background signal hampering measurements of the ratio between the densities of deuterium and tritium fuel ions in plasma in the thermal energy range. The injection of a diagnostic hydrogen (H0) beam does not affect measurements owing to the high mass resolution of the analyzers.

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • V. I. Afanasyev
    • 1
  • P. R. Goncharov
    • 2
  • M. I. Mironov
    • 1
  • V. G. Nesenevich
    • 1
  • M. P. Petrov
    • 1
  • S. Ya. Petrov
    • 1
  • V. Yu. Sergeev
    • 2
  1. 1.Ioffe Physical Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia

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