A quantitative comparison between confined fast ion data and models from radio frequency heating experiments with the three ion scenarios at JET
| Autor: | M. Nocente (1,2, Ye.O. Kazakov (3, V. Kiptily (4, T. Craciunescu (5, J. Eriksson (6, J. Faustin (7, L. Giacomelli (2, G. Gorini (1, 2, C. Hellesen (6, E. Lerche (3, M. Mantsinen (8, J. Ongena (3, M. Salewski (9, S. Sharapov (4, M. Tardocchi (2, D. Van Eester (3, JET Contributors |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | 45th EPS Conference on Plasma Physics, Praga, 2-6 Luglio 2018 info:cnr-pdr/source/autori:M. Nocente (1,2; Ye.O. Kazakov (3; V. Kiptily (4; T. Craciunescu (5; J. Eriksson (6; J. Faustin (7; L. Giacomelli (2; G. Gorini (1;2; C. Hellesen (6; E. Lerche (3; M. Mantsinen (8; J. Ongena (3; M. Salewski (9; S. Sharapov (4; M. Tardocchi (2; D. Van Eester (3; and JET Contributors/congresso_nome:45th EPS Conference on Plasma Physics/congresso_luogo:Praga/congresso_data:2-6 Luglio 2018/anno:2018/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | An effective way to generate fast ions in a fusion plasma is by means of Ion Cyclotron Resonance Heating (ICRH). The most adopted scenario is the so called minority heating, where a minority species at a few percent level is added to the main bulk plasma and is accelerated by ICRH. A typical example is the heating of 3He ions in a bulk deuterium plasma, which has also been used to study the excitation of fast ion instabilities and their transport [1]. A new ICRH scenario for plasma heating and fast ion studies has been theoretically proposed and experimentally demonstrated at the JET and Alcator C-mod tokamaks [2]. It is based on optimizing the polarization of the wave at the resonance in the vicinity of the ion-ion hybrid layer. This can be accomplished in a 3 ion species plasma, where two bulk species determine the propagation properties of the wave and a third species, which is added at the per mille level, efficiently absorbs the power in the vicinity of the ion-ion hybrid layer. In this paper we present a first quantitative analysis of the data obtained in a recent experiment on 3 ion ICRH heating in a D- (3He)-H plasma at JET, where H and D, in the ratio of approximately 70:30, were the two bulk species required by the scenario and 3He was the species to accelerate (X[3He] 0:2?0:3%). |
| Databáze: | OpenAIRE |
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