First Nitrogen-seeding Experiments in JET with the ITER-like Wall

M. Oberkofler, D. Douai, T. Dittmar, E. Joffrin, S. Brezinsek, J.W. Coenen, S. Grünhagen, A. Drenik, Leena Aho-Mantila, R. Neu, M. Stamp, A. Meigs, G. Calabro, U. Kruezi, A. Martin Rojo, B. Sieglin, M. Brix, S. Marsen, EFDA-JET contributors

Research output: Contribution to journalArticle in a proceedings journalScientific

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Abstract

In this contribution we present results from the first N2 seeding experiments in JET performed after installation of the ITER-like Wall. Gas balance measurements for seeded L-mode discharges indicate very strong N2 retention as well as a potential increase in D2 retention. The possible influence of ammonia production on this apparent retention is discussed. Plasma parameters and impurity content were monitored throughout the seeded discharges as well as during subsequent clean-up discharges. These experiments give first insight into phenomena related to the use of nitrogen as seeding gas in JET with the ITER-like Wall, such as ammonia production and nitrogen legacy.
Original languageEnglish
Pages (from-to)S258-S261
JournalJournal of Nuclear Materials
Volume438
Issue numberSupplement
DOIs
Publication statusPublished - 2013
MoE publication typeB3 Non-refereed article in conference proceedings
Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
Duration: 21 May 201225 May 2012

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inoculation
Ammonia
Nitrogen
Gases
nitrogen
ammonia
Discharge (fluid mechanics)
Experiments
Impurities
Plasmas
gases
installing
impurities

Cite this

Oberkofler, M., Douai, D., Dittmar, T., Joffrin, E., Brezinsek, S., Coenen, J. W., ... contributors, EFDA-JET. (2013). First Nitrogen-seeding Experiments in JET with the ITER-like Wall. Journal of Nuclear Materials, 438(Supplement), S258-S261. https://doi.org/10.1016/j.jnucmat.2013.01.041
Oberkofler, M. ; Douai, D. ; Dittmar, T. ; Joffrin, E. ; Brezinsek, S. ; Coenen, J.W. ; Grünhagen, S. ; Drenik, A. ; Aho-Mantila, Leena ; Neu, R. ; Stamp, M. ; Meigs, A. ; Calabro, G. ; Kruezi, U. ; Martin Rojo, A. ; Sieglin, B. ; Brix, M. ; Marsen, S. ; contributors, EFDA-JET. / First Nitrogen-seeding Experiments in JET with the ITER-like Wall. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. Supplement. pp. S258-S261.
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title = "First Nitrogen-seeding Experiments in JET with the ITER-like Wall",
abstract = "In this contribution we present results from the first N2 seeding experiments in JET performed after installation of the ITER-like Wall. Gas balance measurements for seeded L-mode discharges indicate very strong N2 retention as well as a potential increase in D2 retention. The possible influence of ammonia production on this apparent retention is discussed. Plasma parameters and impurity content were monitored throughout the seeded discharges as well as during subsequent clean-up discharges. These experiments give first insight into phenomena related to the use of nitrogen as seeding gas in JET with the ITER-like Wall, such as ammonia production and nitrogen legacy.",
author = "M. Oberkofler and D. Douai and T. Dittmar and E. Joffrin and S. Brezinsek and J.W. Coenen and S. Gr{\"u}nhagen and A. Drenik and Leena Aho-Mantila and R. Neu and M. Stamp and A. Meigs and G. Calabro and U. Kruezi and {Martin Rojo}, A. and B. Sieglin and M. Brix and S. Marsen and EFDA-JET contributors",
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Oberkofler, M, Douai, D, Dittmar, T, Joffrin, E, Brezinsek, S, Coenen, JW, Grünhagen, S, Drenik, A, Aho-Mantila, L, Neu, R, Stamp, M, Meigs, A, Calabro, G, Kruezi, U, Martin Rojo, A, Sieglin, B, Brix, M, Marsen, S & contributors, EFDA-JET 2013, 'First Nitrogen-seeding Experiments in JET with the ITER-like Wall', Journal of Nuclear Materials, vol. 438, no. Supplement, pp. S258-S261. https://doi.org/10.1016/j.jnucmat.2013.01.041

First Nitrogen-seeding Experiments in JET with the ITER-like Wall. / Oberkofler, M.; Douai, D.; Dittmar, T.; Joffrin, E.; Brezinsek, S.; Coenen, J.W.; Grünhagen, S.; Drenik, A.; Aho-Mantila, Leena; Neu, R.; Stamp, M.; Meigs, A.; Calabro, G.; Kruezi, U.; Martin Rojo, A.; Sieglin, B.; Brix, M.; Marsen, S.; contributors, EFDA-JET.

In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S258-S261.

Research output: Contribution to journalArticle in a proceedings journalScientific

TY - JOUR

T1 - First Nitrogen-seeding Experiments in JET with the ITER-like Wall

AU - Oberkofler, M.

AU - Douai, D.

AU - Dittmar, T.

AU - Joffrin, E.

AU - Brezinsek, S.

AU - Coenen, J.W.

AU - Grünhagen, S.

AU - Drenik, A.

AU - Aho-Mantila, Leena

AU - Neu, R.

AU - Stamp, M.

AU - Meigs, A.

AU - Calabro, G.

AU - Kruezi, U.

AU - Martin Rojo, A.

AU - Sieglin, B.

AU - Brix, M.

AU - Marsen, S.

AU - contributors, EFDA-JET

PY - 2013

Y1 - 2013

N2 - In this contribution we present results from the first N2 seeding experiments in JET performed after installation of the ITER-like Wall. Gas balance measurements for seeded L-mode discharges indicate very strong N2 retention as well as a potential increase in D2 retention. The possible influence of ammonia production on this apparent retention is discussed. Plasma parameters and impurity content were monitored throughout the seeded discharges as well as during subsequent clean-up discharges. These experiments give first insight into phenomena related to the use of nitrogen as seeding gas in JET with the ITER-like Wall, such as ammonia production and nitrogen legacy.

AB - In this contribution we present results from the first N2 seeding experiments in JET performed after installation of the ITER-like Wall. Gas balance measurements for seeded L-mode discharges indicate very strong N2 retention as well as a potential increase in D2 retention. The possible influence of ammonia production on this apparent retention is discussed. Plasma parameters and impurity content were monitored throughout the seeded discharges as well as during subsequent clean-up discharges. These experiments give first insight into phenomena related to the use of nitrogen as seeding gas in JET with the ITER-like Wall, such as ammonia production and nitrogen legacy.

U2 - 10.1016/j.jnucmat.2013.01.041

DO - 10.1016/j.jnucmat.2013.01.041

M3 - Article in a proceedings journal

VL - 438

SP - S258-S261

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - Supplement

ER -

Oberkofler M, Douai D, Dittmar T, Joffrin E, Brezinsek S, Coenen JW et al. First Nitrogen-seeding Experiments in JET with the ITER-like Wall. Journal of Nuclear Materials. 2013;438(Supplement):S258-S261. https://doi.org/10.1016/j.jnucmat.2013.01.041