Physics and applications of three-ion ICRF scenarios for fusion research
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A2 Katsausartikkeli tieteellisessä aikakauslehdessä
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Date
2021-02-01
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en
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Physics of Plasmas, Volume 28, issue 2
Abstract
This paper summarizes the physical principles behind the novel three-ion scenarios using radio frequency waves in the ion cyclotron range of frequencies (ICRF). We discuss how to transform mode conversion electron heating into a new flexible ICRF technique for ion cyclotron heating and fast-ion generation in multi-ion species plasmas. The theoretical section provides practical recipes for selecting the plasma composition to realize three-ion ICRF scenarios, including two equivalent possibilities for the choice of resonant absorbers that have been identified. The theoretical findings have been convincingly confirmed by the proof-of-principle experiments in mixed H-D plasmas on the Alcator C-Mod and JET tokamaks, using thermal 3He and fast D ions from neutral beam injection as resonant absorbers. Since 2018, significant progress has been made on the ASDEX Upgrade and JET tokamaks in H-4He and H-D plasmas, guided by the ITER needs. Furthermore, the scenario was also successfully applied in JET D-3He plasmas as a technique to generate fusion-born alpha particles and study effects of fast ions on plasma confinement under ITER-relevant plasma heating conditions. Tuned for the central deposition of ICRF power in a small region in the plasma core of large devices such as JET, three-ion ICRF scenarios are efficient in generating large populations of passing fast ions and modifying the q-profile. Recent experimental and modeling developments have expanded the use of three-ion scenarios from dedicated ICRF studies to a flexible tool with a broad range of different applications in fusion research.Description
| openaire: EC/H2020/633053/EU//EUROfusion
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Kazakov, Y O, Ongena, J, Wright, J C, Wukitch, S J, Bobkov, V, Garcia, J, Kiptily, V G, Mantsinen, M J, Nocente, M, Schneider, M, Weisen, H, Baranov, Y, Baruzzo, M, Bilato, R, Chomiczewska, A, Coelho, R, Craciunescu, T, Crombé, K, Dreval, M, Dumont, R, Dumortier, P, Durodié, F, Eriksson, J, Fitzgerald, M, Galdon-Quiroga, J, Gallart, D, Garcia-Muñoz, M, Giacomelli, L, Giroud, C, Gonzalez-Martin, J, Hakola, A, Jacquet, P, Johnson, T, Kappatou, A, Keeling, D, King, D, Kirov, K K, Lamalle, P, Lennholm, M, Lerche, E, Maslov, M, Mazzi, S, Menmuir, S, Monakhov, I, Nabais, F, Nave, M F F, Ochoukov, R, Polevoi, A R, Pinches, S D, Plank, U, Rigamonti, D, Salewski, M, Schneider, P A, Sharapov, S E, Štancar, Thorman, A, Valcarcel, D, Van Eester, D, Van Schoor, M, Varje, J, Weiland, M & Wendler, N 2021, ' Physics and applications of three-ion ICRF scenarios for fusion research ', Physics of Plasmas, vol. 28, no. 2, 020501 . https://doi.org/10.1063/5.0021818
