Synergetic heating of D-NBI ions in the vicinity of the mode conversion layer in H-D plasmas in JET with the ITER like wall.

J. Ongena, Ye.O. Kazakov, Y. Baranov, C. Hellesen, J. Eriksson, T. Johnson, V.G. Kiptily, M.J. Mantsinen, M. Nocente, R. Bilato, A. Cardinali, C. Castaldo, K. Crombé, A. Czarnecka, R. Dumont, J. Faustin, L. Giacomelli, V. Goloborodko, J. Graves, Ph. JacquetN. Krawczyk, E. Lerche, L. Meneses, M.F.F. Nave, H. Patten, M. Schneider, D. Van Eester, H. Weisen, J.C. Wright

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8 Citations (Scopus)

Abstract

This paper discusses the extension of the 'three-ion' species ICRF technique for heating mixture plasmas using fast injected NBI ions as resonant 'third' species. In this scenario the ICRF power is absorbed by the fast beam ions in the vicinity of the mode conversion layer where the left-hand polarized RF electric field E+is strongly enhanced. The ions in the beam velocity distribution that have a Doppler-shifted resonance close to the mode conversion layer efficiently absorb RF power and undergo acceleration. We show first experimental observations of ICRF heating of D-NBI ions in H-D plasmas in JET with the ITER-like wall. In agreement with theoretical predictions and numerical modelling, acceleration of the D-NBI ions in this D-(DNBI)-H scenario is confirmed by several fast-ion measurements. An extension of the heating scheme discussed here is acceleration of T-NBI and D-NBI ions in D-T plasmas, offering the potential to further boost the Q-value in future D-T campaigns in JET.
Original languageEnglish
DOIs
Publication statusPublished - 23 Oct 2017
Externally publishedYes
Event22nd Topical Conference on Radio-Frequency Power in Plasmas 2017 - Aix en Provence, France
Duration: 23 Oct 2017 → …

Conference

Conference22nd Topical Conference on Radio-Frequency Power in Plasmas 2017
CountryFrance
CityAix en Provence
Period23/10/17 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ongena, J., Kazakov, Y. O., Baranov, Y., Hellesen, C., Eriksson, J., Johnson, T., Kiptily, V. G., Mantsinen, M. J., Nocente, M., Bilato, R., Cardinali, A., Castaldo, C., Crombé, K., Czarnecka, A., Dumont, R., Faustin, J., Giacomelli, L., Goloborodko, V., Graves, J., ... Wright, J. C. (2017). Synergetic heating of D-NBI ions in the vicinity of the mode conversion layer in H-D plasmas in JET with the ITER like wall.. Paper presented at 22nd Topical Conference on Radio-Frequency Power in Plasmas 2017, Aix en Provence, France. https://doi.org/10.1051/epjconf/201715702006