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Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG
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- Drenik, A. (author)
- Max Planck Inst Plasma Phys, D-85748 Garching, Germany.;Max Planck Inst Plasma Phys, D-85748 Garching, Germany.;Slovenian Fusion Assoc, Jozef Stefan Inst, Jamova 39, SI-1000 Ljubljana, Slovenia.
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- Bergsåker, Henric (author)
- KTH,Fusionsplasmafysik
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- Bykov, Igor (author)
- KTH,Fusionsplasmafysik
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- Max Planck Inst Plasma Phys, D-85748 Garching, Germany;Max Planck Inst Plasma Phys, D-85748 Garching, Germany.;Slovenian Fusion Assoc, Jozef Stefan Inst, Jamova 39, SI-1000 Ljubljana, Slovenia. Fusionsplasmafysik (creator_code:org_t)
- 2017-09-19
- 2017
- English.
- In: Physica Scripta. - : IOP PUBLISHING LTD. - 0031-8949 .- 1402-4896. ; T170
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The isotope content of the plasma reflects on the dynamics of isotope changeover experiments, efficiency of wall conditioning and the performance of a fusion device in the active phase of operation. The assessment of the isotope ratio of hydrogen and methane molecules is used as a novel method of assessing the plasma isotope ratios at JET and ASDEX-Upgrade (AUG). The isotope ratios of both molecules in general shows similar trends as the isotope ratio detected by other diagnostics. At JET, the absolute values of RGA signals are in relatively good agreement with each other and with spectroscopy data, while at AUG the deviation from neutral particle analyser data are larger, and the results show a consistent spatial distribution of the isotope ratio. It is further shown that the isotope ratio of the hydrogen molecule can be used to study the degree of dissociation of the injected gas during changeover experiments.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- residual gas analysis
- isotope ratio
- plasma-wall interaction
- JET
- AUG
Publication and Content Type
- ref (subject category)
- art (subject category)
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