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Megawatt power generation of the dual-frequency gyrotron for TCV at 84 and 126 GHz, in long pulses

Hogge, Jean-Philippe; Alberti, Stefano; Avramidis, Konstantinos A.; Bruschi, Alex; Bin, William; Cau, Francesca; Cismondi, Fabio; Dubray, Jérémie; Fasel, Damien; Gantenbein, Gerd; Garavaglia, Saul; Genoud, Jérémy; Goodman, Timothy P.; Illy, Stefan; Jin, Jianbo; Legrand, François; Marchesin, Rodolphe; Marlétaz, Blaise; Masur, Jonathan; Moro, Alessandro; ... mehr

Abstract (englisch):
In the frame of the TCV Tokamak upgrade, two 84/126 GHz/2 s dual frequency gyrotrons designed by SPC and KIT and manufactured by THALES will be added to the existing EC-System. The first unit has been delivered to EPFL-SPC and tested. In the commissioning configuration, a matching optics unit (MOU) is connected to the gyrotron window. The RF is then coupled to the HE11 mode of a 63.5mm corrugated waveguide and dissipated in a load procured by CNR after 4m of waveguide and 2 miter bends. Owing to the flexible triode gun design giving the possibility to adjust the pitch angle parameter, the specifications were met at both frequencies. At 84 GHz (TE17,5 mode), a power of 0.930 MW was measured in the calorimeter, with a pulse duration of 1.1 s. At the high frequency (126 GHz, TE26,7 mode), a power of 1.04 MW was reached for a pulse length of 1.2 s. Accounting for the load reflection and the ohmic losses in the various subcomponents of the transmission line and the tube, it is estimated that the output power at the gyrotron window is in excess of 1 MW at both frequencies, with an electronic efficiency of 32% and 34% at 84 GHz and 126 GHz respectively. ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2020
Sprache Englisch
Identifikator ISBN: 978-0-7354-2013-7
ISSN: 0094-243X
KITopen-ID: 1000126083
HGF-Programm 31.03.02 (POF III, LK 01) Plasma Heizsysteme
Weitere HGF-Programme 31.03.05 (POF III, LK 01) Port- und Plant Engineering
Erschienen in 23rd Topical Conference on Radiofrequency Power in Plasmas
Veranstaltung 23rd Topical Conference on Radiofrequency Power in Plasmas (2019), Hefei, China, 14.05.2019 – 17.05.2019
Auflage 2254
Verlag AIP Publishing
Seiten 090006
Serie AIP Conference Proceedings
Projektinformation EUROfusion (EU, H2020, 633053)
Nachgewiesen in Dimensions
Scopus
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