Impact of ICRF fast-ions on core turbulence and MHD activity in ASDEX upgrade
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A4 Artikkeli konferenssijulkaisussa
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Date
2023-08-18
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en
Pages
10
1-10
1-10
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AIP Conference Proceedings, Volume 2984, issue 1
Abstract
Experiments in various tokamaks and their analysis identify the fast ions (FI) generated by NBI and/or ICRF heating as one of the main causes of the observed improvement in core confinement: fast ions can reduce core microturbulence (mainly Ion-Temperature-Gradient (ITG) driven modes) either electrostatically or electromagnetically, or they can resonate with fishbones and high-frequency Alfvén modes, which in turn contribute in stabilizing ITG. In this perspective, we discuss recent experiments done on ASDEX Upgrade (AUG) where ICRF is the main actuator for FI generation for energies above 100 keV. Additionally, ICRF-FIs can substantially impact the MHD activity and its consequent effects on fast ion losses (FILs) and ion-cyclotron emission (ICE). We present dedicated AUG experiments with NBI-D further accelerated by ICRF.Description
Funding Information: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. Funding Information: We wish to acknowledge M. Bergmann, M. Brambilla, P. David, R. Mc Dermott, Ph. Lauber, U. Plank, M. Reisner, S. Sharapov, G. Staebler, G. Tardini, E. Viezzer, B. Zimmermann, and to thank A. Kappatou, E. Tsitrone and A. Hakola for their kind support. J. Galdon-Quiroga acknowledges funding from the Spanish Ministry of Science and Innovation under grant no. FJC2019-041092-I. See the author list of U. Stroth et al. 2022 Nucl. Fusion 62 042006 for the ASDEX Upgrade Team; see the author list of B. Labit et al. 2019 Nucl. Fusion 59 086020 for the EUROfusion MST1 team. Publisher Copyright: © 2023 Author(s).
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Bilato, A, Angioni, C, Navarro, A B, Bobkov, V, Bosman, T, Di Siena, A, Fable, E, Fischer, R, Galdon-Quiroga, J, Görler, T, Hidalgo-Salaverri, J, Jenko, F, Johnson, T, Kazakov, Y O, Kudlacek, O, Manyer, J, Mantsinen, M, Ochoukov, R, Poli, E, Rueda-Rueda, J, Schneider, P A, Sipilä, S, Tierens, W, Usoltseva, M, Weiland, M, ASDEX Upgrade Team & EUROfusion MST1 Team 2023, ' Impact of ICRF fast-ions on core turbulence and MHD activity in ASDEX upgrade ', AIP Conference Proceedings, vol. 2984, no. 1, 030010, pp. 1-10 . https://doi.org/10.1063/5.0163029