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Basic design considerations for a frequency step-tunable electron cyclotron wave system to suppress NTMs in DEMO

Wu, Chuanren ORCID iD icon; Aiello, Gaetano ORCID iD icon; Avramidis, Konstantinos A.; Bruschi, Alessandro; Fable, Emiliano; Franke, Thomas; Gantenbein, Gerd; Garavaglia, Saul; Granucci, Gustavo; Illy, Stefan; Janky, Filip; Jelonnek, John; Kudláček, Ondřej; Moro, Alessandro; Poli, Emanuele; Ruess, Tobias ORCID iD icon; Scherer, Theo; Schramm, Raphael; Siccinio, Mattia; ... mehr


An Electron Cyclotron Wave (ECW) system will be used in the European DEMO for the stabilization of Neoclassical Tearing Modes (NTMs). In order to avoid movable mirrors in the harsh environment close to the plasma and to simplify the NTM launcher integration, the tuning of the ECW deposition location can be achieved by launching frequency-tunable ECWs from fixed mirrors while the frequency is tuned in discrete steps of 2–3GHz. An overview of the frequency step-tunable ECW system for NTM stabilization is presented. The design considerations are discussed based on the current DEMO baseline parameters and the status of technologies. A simulation of NTM stabilization with an idealized frequency tunable ECW system on an analytical NTM model is shown. The simulation takes into account a realistic tuning speed based on the present technology and considers the current NTM launcher configurations in DEMO. A simple sweeping strategy is adapted for the control of frequency. Various uncertainties, which will affect the feasibility, need to be further investigated.

Postprint §
DOI: 10.5445/IR/1000140637
Veröffentlicht am 19.11.2022
DOI: 10.1016/j.fusengdes.2021.112931
Zitationen: 2
Web of Science
Zitationen: 1
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 0920-3796
KITopen-ID: 1000140637
HGF-Programm 31.13.02 (POF IV, LK 01) Plasma Heating & Current Drive Systems
Erschienen in Fusion engineering and design
Verlag Elsevier
Band 173
Seiten Art.-Nr.: 112931
Projektinformation EUROfusion_H2020 (EU, H2020, 633053)
Vorab online veröffentlicht am 18.11.2021
Schlagwörter DEMO, neoclassical tearing mode, electron cyclotron wave, heating, current drive, frequency steering, frequency step-tunable gyrotron
Nachgewiesen in Scopus
Web of Science
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