Speaker
Tomasz Rzesnicki
(IHM)
Description
The EU 1 MW, 170 GHz gyrotron with hollow cylindrical cavity has been designed within EGYC (European GYrotron Consortium) in collaboration with the industrial partner Thales Electron Devices (TED) and under the coordination of Fusion for Energy (F4E). In the frame of the EU program the short-pulse (SP) version of this tube has been designed and manufactured by KIT in collaboration with TED. The experimental verification of the SP gyrotron prototype has been successfully completed in 2015. The achieved experimental results show a very stable gyrotron operation with RF output power above 1 MW at reasonable interaction efficiency around 35 % (without depressed collector). The gyrotron was operated up to 10 ms pulse length; the nominal cavity mode TE32,9 has been excited at the frequency 170.1 GHz being in agreement with the ITER specification. The Gaussian mode content of the output RF beam was about 98 % and the total level of internal stray radiation in the range of 2-3 %.The manufacturing of a first industrial continuous-wave (CW) prototype gyrotron, based on the design of the SP gyrotron, has been completed in November 2015. The tube has been delivered to KIT and recently installed into the superconducting gyrotron magnet. The start of the tests is scheduled for February 2016. At first, in order to optimize the gyrotron operating point in terms of stability and efficiency of the RF power generation, the tube will be operated in the short-pulse regime. Furthermore, detailed investigations of the mode converter efficiency, by measuring of the fundamental Gaussian mode content and stray radiation level, will be performed as well. The next phase will consist in pulse length extension and optimisation of the associated operating point. The experimental results will be presented and discussed in this paper.
Co-authors
Alessandro Bruschi
(Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Via R.Cozzi 53, 20125 Milano, Italy)
Carsten Lechte
(IGVP, University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany)
Christian Schlatter
(SPC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland)
Falk Braunmueller
(SPC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland)
Ferran Albajar
(European Joint Undertaking for ITER and the Development of Fusion Energy (F4E), Barcelona, E-08019, Spain)
Georges Latsas
(Faculty of Physics, National and Kapodistrian University of Athens, Zografou, GR-157 84, Athens, Greece)
Gerd Gantenbein
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Ioannis Chelis
(National Technical University of Athens, Athens, Greece)
Ioannis Pagonakis
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Ioannis Tigelis
(Faculty of Physics, National and Kapodistrian University of Athens, Zografou, GR-157 84, Athens, Greece)
Jean-Philippe Hogge
(SPC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland)
Jianbo Jin
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
John Jelonnek
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
John Vomvoridis
(National Technical University of Athens, Athens, Greece)
Kostas Avramidis
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Manfred Thumm
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Markus Losert
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Martin Schmid
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Maurizio Lontano
(Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Via R.Cozzi 53, 20125 Milano, Italy)
Minh Quang Tran
(SPC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland)
Pierre-Etienne Frigot
(European Joint Undertaking for ITER and the Development of Fusion Energy (F4E), Barcelona, E-08019, Spain)
Stefan Illy
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Stefano Alberti
(SPC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland)
Thorsten Kobarg
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Tomasz Rzesnicki
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
Tullio Bonicelli
(European Joint Undertaking for ITER and the Development of Fusion Energy (F4E), Barcelona, E-08019, Spain)
Virgile Hermann
(Thales Electron Devices, 2 rue Marcel Dassault, Vélizy-Villacoublay, France)
Walter Kasparek
(IGVP, University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany)
Yoann Rozier
(Thales Electron Devices, 2 rue Marcel Dassault, Vélizy-Villacoublay, France)
Zisis Ioannidis
(IHM, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany)
