The Role of Combined ICRF and NBI Heating in JET Hybrid Plasmas in Quest for High D-T Fusion Yield

Mervi Mantsinen, Clive Challis, Domenico Frigione, Jonathan Graves, Joerg Hobirk, Eva Belonohy, Agata Czarnecka, Jacob Eriksson, Dani Gallart, Marc Goniche, Carl Hellesen, Philippe Jacquet, Emmanuel Joffrin, Damian King, Natalia Krawczyk, Morten Lennholm, Ernesto Lerche, Ewa Pawelec, George Sips, Emilia R. SolanoMaximos Tsalas, Marco Valisa

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

Combined ICRF and NBI heating played a key role in achieving the world-record fusion yield in the first deuterium-tritium campaign at the JET tokamak in 1997. The current plans for JET include new experiments with deuterium-tritium (D-T) plasmas with more ITER-like conditions given the recently installed ITER-like wall (ILW). In the 2015-2016 campaigns, significant efforts have been devoted to the development of high-performance plasma scenarios compatible with ILW in preparation of the forthcoming D-T campaign. Good progress was made in both the inductive (baseline) and the hybrid scenario: a new record JET ILW fusion yield with a significantly extended duration of the high-performance phase was achieved. This paper reports on the progress with the hybrid scenario which is a candidate for ITER longpulse operation (∼1000 s) thanks to its improved normalized confinement, reduced plasma current and higher plasma beta with respect to the ITER reference baseline scenario. The combined NBI+ICRF power in the hybrid scenario was increased to 33 MW and the record fusion yield, averaged over 100 ms, to 2.9x1016neutrons/s from the 2014 ILW fusion record of 2.3x1016neutrons/s. Impurity control with ICRF waves was one of the key means for extending the duration of the high-performance phase. The main results are reviewed covering both key core and edge plasma issues.
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

Mantsinen, M., Challis, C., Frigione, D., Graves, J., Hobirk, J., Belonohy, E., Czarnecka, A., Eriksson, J., Gallart, D., Goniche, M., Hellesen, C., Jacquet, P., Joffrin, E., King, D., Krawczyk, N., Lennholm, M., Lerche, E., Pawelec, E., Sips, G., ... Valisa, M. (2017). The Role of Combined ICRF and NBI Heating in JET Hybrid Plasmas in Quest for High D-T Fusion Yield. Paper presented at 22nd Topical Conference on Radio-Frequency Power in Plasmas 2017, Aix en Provence, France. https://doi.org/10.1051/epjconf/201715703032