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

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 (D{sup 0}) 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 (H{sup 0}) beam does not affect measurements owing to the high mass resolution of the analyzers.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [2]
  1. Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)
  2. Peter the Great St. Petersburg Polytechnic University (Russian Federation)
Publication Date:
OSTI Identifier:
22472017
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 41; Journal Issue: 12; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM INJECTION; COMPUTERIZED SIMULATION; DEUTERIUM; DISTRIBUTION FUNCTIONS; HYDROGEN; HYDROGEN IONS; ISOTOPE RATIO; ITER TOKAMAK; MASS RESOLUTION; NEUTRAL PARTICLE ANALYZERS; NEUTRAL PARTICLES; PLASMA; PLASMA DIAGNOSTICS; TRITIUM