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2019 Status on the design of the EU/KIT TE34,19-mode coaxial-cavity gyrotron towards dual-frequency 170/204 GHz operation

Ruess, Tobias ORCID iD icon; Avramidis, Konstantinos A.; Gantenbein, Gerd; Illy, Stefan; Ioannidis, Zisis; Jin, Jianbo; Kalaria, Parth; Lutz, Felix-Christopher; Marek, Alexander ORCID iD icon; Pagonakis, Ioannis Gr.; Ruess, Sebastian; Rzesnicki, Tomasz; Thumm, Manfred; Wagner, Dietmar; Jelonnek, John

Abstract (englisch):

Fusion gyrotrons for DEMO and future Fusion Power Plants (FPP) will require multi-megawatt continuous-wave (CW) operation at multiple possible frequencies for Electron Cyclotron Resonance Heating and Current Drive (EC H&CD). Currently, for the gyrotron R&D it is assumed that the operating frequencies will start from 170 GHz (ITER) and will move up to a maximum of 240 GHz.
The existing 170 GHz 2 MW TE34,19-mode coaxial-cavity modular short-pulse (SP) pre-prototype gyrotron was modified to verify the coaxial-cavity technology at long pulses. It is accompanied by a theoretical investigation of a possible upgrade of the existing tube towards the operation at higher frequencies using the new 10.5 T super-conducting (SC) magnet of the FULGOR gyrotron test stand. The target is a first of its kind operation of the coaxial-cavity pre-prototype at 204 GHz and at 236 GHz. In initial simulations, it has already been verified, that the operation at 204 GHz requires a slight modification of the interaction cavity and an enlargement of the tube. Taking the modifications into account the predicted RF output powers are 2.63/2.04 MW and the interaction efficiency are 37.8/34.5 % at operating frequencies of 170/204 GHz, respectively. ... mehr


Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Vortrag
Publikationsjahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000095989
HGF-Programm 31.03.02 (POF III, LK 01) Plasma Heizsysteme
Veranstaltung 31st Joint Russian-German Meeting on ECRH and Gyrotrons (2019), Lenggries, Deutschland, 03.06.2019 – 08.06.2019
Projektinformation EUROfusion (EU, H2020, 633053)
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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