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Frequency step-tunable ECRH&CD from mid-plane port plug for the NTM stabilization in DEMO

Wu, Chuanren; Avramidis, Konstantinos; Bruschi, Alex; Franke, Thomas; Granucci, Gustavo; Jelonnek, John; Moro, Alessandro; Poli, Emanuele; Thumm, Manfred; Quang, Minh

Abstract (englisch):
Electron cyclotron resonance heating and current drive (ECRH&CD) is able to deposit megawatt power in a localized plasma volume. ITER will use the front steering to adjust the position of the localized EC wave absorption. To avoid using movable plasma facing mirrors with actuators in a harsh environ¬ment close to the plasma in a fusion reactor, the remote steering can be applied, as demonstrated in the Wendelstein-7X stellarator. However, the engineering for the latter steering method is not easy, due to the fact that it needs a very large focusing front mirror. Another method, the so-called mid-steering option is under development for DEMO, in which the actuator and the first mirror sit behind the breeding blanket. Nonetheless high neutron fluxes are expected, which would limit the lifetime of the system. On the other hand, the frequency steering, which involves discrete frequencies in steps of 2 to 3 GHz for a total frequency bandwidth in the order of ± 10 GHz, could also steer the position of the localized current drive, avoiding large movable or fixed front mirrors and actuators, and thus being a lifetime component for DEMO. ... mehr

Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Vortrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000097940
HGF-Programm 31.03.02 (POF III, LK 01) Plasma Heizsysteme
Veranstaltung Workshop on RF Heating Technology of Fusion Plasmas (US-EU-JPN RF Heating Technology Workshop) (2019), Freiburg im Breisgau, Deutschland, 09.09.2019 – 12.09.2019
Projektinformation EUROfusion (EU, H2020, 633053)
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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