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

Journal Article · Tue Dec 15 04:00:00 EST 2015 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X15120016· OSTI ID:22472017

Afanasyev, V. I. ^[1]; Mironov, M. I.; Petrov, M. P.; Petrov, S. Ya. ^[1]; Sergeev, V. Yu. ^[2]

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1. Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)
2. Peter the Great St. Petersburg Polytechnic University (Russian Federation)

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.

• OSTI ID: 22472017
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 12 Vol. 41; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

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