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Title: An instrumental and numerical method to determine the hydrogenic ratio in isotopic experiments in the TJ-II stellarator

The isotope effect is an important topic that is relevant for future D-T fusion reactors, where the use of deuterium, rather than hydrogen, may lean to improved plasma confinement. An evaluation of the ratio of hydrogen/deuterium is needed for isotope effect studies in current isotopic experiments. Here, the spectral range around H{sub α} and D{sub α} lines, obtained with an intensified multi-channel detector mounted to a 1-m focal length spectrometer, is analyzed using a fit function that includes several Gaussian components. The isotopic ratio evolution for a single operational day of the TJ-II stellarator is presented. The role of injected hydrogen by Neutral Beam Injection heating is also studied.
Authors:
;  [1] ;  [2]
  1. Laboratorio Nacional de Fusión, CIEMAT, Madrid (Spain)
  2. Departamento de Física, Universidad Carlos III de Madrid, Leganés (Spain)
Publication Date:
OSTI Identifier:
22308994
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM INJECTION HEATING; DEUTERIUM; D-T REACTORS; HYDROGEN; ISOTOPE EFFECTS; ISOTOPE RATIO; MEASURING METHODS; NUMERICAL ANALYSIS; PLASMA CONFINEMENT; SPECTROMETERS; STELLARATORS