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Exploring fusion-reactor physics with high-power electron cyclotron resonance heating on ASDEX Upgrade

Stober, Joerg; Reisner, Maximilian; Angioni, Clemente; Banon Navarro, Alejandro; Bobkov, Volodymyr V; Bock, Alexander; Denisov, G G; Fable, Emiliano; Fischer, Rainer; Gantenbein, Gerd; Gil, Luis; Görler, Tobias; Igochine, Valentin; Kasparek, Walter; Leuterer, Fritz; Litvak, Alexander G; McDermott, Rachael M; Meier, Andreas; Monaco, Francesco; Münich, Max; ... mehr

Abstract:
The electron cyclotron resonance heating (ECRH) system of the ASDEX Upgrade tokomak has been upgraded over the last 15 years from a 2MW, 2 s, 140 GHz system to an 8MW, 10 s, dual frequency system (105/140 GHz). The power exceeds the L/H power threshold by at least a factor of two, even for high densities, and roughly equals the installed ion cyclotron range of frequencies power. The power of both wave heating systems together (>10MW in the plasma) is about half of the available neutral beam injection (NBI) power, allowing significant variations of torque input, of the shape of the heating profile and of Qe/Qi, even at high heating power. For applications at a low magnetic field an X3-heating scheme is routinely in use. Such a scenario is now also forseen for ITER to study the first H-modes at one third of the full field. This versatile system allows one to address important issues fundamental to a fusion reactor: H-mode operation with dominant electron heating, accessing low collisionalities in full metal devices (also related to suppression of edge localized modes with resonant magnetic perturbations), influence of Te/Ti and rotational shear on transport, and dependence of impurity accumulation on heating profiles. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000100720
Veröffentlicht am 03.04.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0741-3335, 1361-6587
KITopen-ID: 1000100720
HGF-Programm 31.03.05 (POF III, LK 01)
Port- und Plant Engineering
Erschienen in Plasma physics and controlled fusion
Band 62
Heft 2
Seiten Art. Nr.: 024012
Projektinformation EUROfusion (EU, H2020, 633053)
Bemerkung zur Veröffentlichung Plasma Physics and Controlled Fusion, PPCF-EPS, July 8th-12th 2019, Milan
Vorab online veröffentlicht am 09.01.2020
Schlagwörter Tokamak, ECRH, ECCD, q-profile, non-inductive, high-beta
Nachgewiesen in Web of Science
Scopus
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