Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG

A. Drenik; D. Alegre; S. Brezinsek; A. De Castro; U. Kruezi; M. Oberkofler; M. Panjan; G. Primc; T. Reichbauer; M. Resnik; V. Rohde; M. Seibt; P. A. Schneider; T. Wauters; R. Zaplotnik

doi:10.1088/1402-4896/aa878b

Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG

A. Drenik, D. Alegre, S. Brezinsek, A. De Castro, U. Kruezi, M. Oberkofler, M. Panjan, G. Primc, T. Reichbauer, M. Resnik, V. Rohde, M. Seibt, P. A. Schneider, T. Wauters, R. Zaplotnik

Laboratory for Plasma Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	014021
Journal	Physica Scripta
Volume	2017
Issue number	T170
DOIs	https://doi.org/10.1088/1402-4896/aa878b
Publication status	Published - 1 Dec 2017
Event	16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 - Neuss/Dusseldorf, Germany Duration: 16 May 2017 → 19 May 2017

Keywords

AUG
JET
isotope ratio
plasma-wall interaction
residual gas analysis

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10.1088/1402-4896/aa878b

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Drenik, A., Alegre, D., Brezinsek, S., De Castro, A., Kruezi, U., Oberkofler, M., Panjan, M., Primc, G., Reichbauer, T., Resnik, M., Rohde, V., Seibt, M., Schneider, P. A., Wauters, T., & Zaplotnik, R. (2017). Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG. Physica Scripta, 2017(T170), Article 014021. https://doi.org/10.1088/1402-4896/aa878b

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title = "Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG",

abstract = "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.",

keywords = "AUG, JET, isotope ratio, plasma-wall interaction, residual gas analysis",

author = "A. Drenik and D. Alegre and S. Brezinsek and {De Castro}, A. and U. Kruezi and M. Oberkofler and M. Panjan and G. Primc and T. Reichbauer and M. Resnik and V. Rohde and M. Seibt and Schneider, {P. A.} and T. Wauters and R. Zaplotnik",

note = "Publisher Copyright: {\textcopyright} 2017 Max-Planck-Institut f{\"u}r Plasmaphysik.; 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 ; Conference date: 16-05-2017 Through 19-05-2017",

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doi = "10.1088/1402-4896/aa878b",

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T1 - Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG

AU - Drenik, A.

AU - Alegre, D.

AU - Brezinsek, S.

AU - De Castro, A.

AU - Kruezi, U.

AU - Oberkofler, M.

AU - Panjan, M.

AU - Primc, G.

AU - Reichbauer, T.

AU - Resnik, M.

AU - Rohde, V.

AU - Seibt, M.

AU - Schneider, P. A.

AU - Wauters, T.

AU - Zaplotnik, R.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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.

AB - 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.

KW - AUG

KW - JET

KW - isotope ratio

KW - plasma-wall interaction

KW - residual gas analysis

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U2 - 10.1088/1402-4896/aa878b

DO - 10.1088/1402-4896/aa878b

M3 - Conference article

AN - SCOPUS:85030842003

SN - 0281-1847

VL - 2017

JO - Physica Scripta

JF - Physica Scripta

IS - T170

M1 - 014021

T2 - 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017

Y2 - 16 May 2017 through 19 May 2017

ER -

Evaluation of the plasma hydrogen isotope content by residual gas analysis at JET and AUG

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