16–21 Sept 2018
Giardini Naxos
Europe/Rome timezone

Recent experiments with the European 1MW, 170GHz industrial CW and short-pulse gyrotrons for ITER

17 Sept 2018, 11:00
2h
Pantelleria Hall - Terrace - ATA Hotel Naxos Beach Resort (Giardini Naxos)

Pantelleria Hall - Terrace - ATA Hotel Naxos Beach Resort

Giardini Naxos

Via Recanati, 26 Giardini Naxos, Messina - Sicily (Italy)
Plasma Heating and Current Drive P1

Speaker

Dr Gerd Gantenbein (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology)

Description

The European Gyrotron Consortium (EGYC) is developing the EU 1 MW, 170 GHz CW industrial prototype gyrotron for ITER in cooperation with the industrial partner Thales Electron Devices (TED) and under the coordination of Fusion for Energy (F4E). This hollow cylindrical cavity gyrotron is based on the 1 MW, 170 GHz short-pulse (SP) modular gyrotron that has been designed and manufactured by KIT in collaboration with TED. The experiments with the CW industrial gyrotron are organized in two phases. The first phase was completed successfully at KIT in 2016. In the SP regime (<10 ms pulses), stable excitation of the nominal cavity mode TE32,9 at 170.22 GHz was achieved for a wide range of operating parameters. The maximum RF output power of the tube is higher than 0.9 MW with a total efficiency of 26% in non-depressed collector operation. The Gaussian mode content of the RF output beam is higher than 97%. In long-pulse operation, pulses with duration of 180 s (limited by the high-voltage power supply at KIT) delivered power higher than 0.8 MW with 38% efficiency (in depressed collector operation). The second phase of the experiments is ongoing at SPC, Lausanne, with the goal to further optimize the output power and extend the pulse duration. In parallel, the experiments with the SP prototype are continued at KIT. The SP tube, which in multiple experimental campaigns delivered power higher than 1 MW with 42% efficiency (in depressed collector operation), is further upgraded. Various depressed collector operation schemes are tested with the goal to achieve an efficiency higher than 50%. Moreover, different beam tunnels will be tested in order to have the possibility to go to higher operating beam currents without exciting parasitic oscillations. In this work, the latest results with the CW and SP prototype gyrotrons will be presented.

Co-authors

Dr Zisis Ioannidis (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Tomasz Rzesnicki (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Konstantinos Avramidis (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Gerd Gantenbein (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Stefan Illy (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr John Jelonnek (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Jianbo Jin (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Ioannis Pagonakis (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Martin Schmid (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Manfred Thumm (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Andy Zein (Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology) Dr Virgile Hermann (Thales Electron Devices) Dr Francois Legrand (Thales Electron Devices) Dr Walter Kasparek (IGVP, University of Stuttgart) Dr Carsten Lechte (IGVP, University of Stuttgart) Dr Stefano Alberti (Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne) Dr Jérémy Genoud (Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne) Dr Jean-Philippe Hogge (Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne) Dr Christian Schlatter (Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne) Dr Minh Quang Tran (Swiss Plasma Center, Ecole Polytechnique Fédérale de Lausanne) Dr Ioannis Chelis (Faculty of Physics, National and Kapodistrian University of Athens) Dr George Latsas (Faculty of Physics, National and Kapodistrian University of Athens) Dr Ioannis Tigelis (Faculty of Physics, National and Kapodistrian University of Athens) Dr Anastasios Zisis (Faculty of Physics, National and Kapodistrian University of Athens) Dr Alessandro Bruschi (Institute of Plasma Physics “P.Caldirola”, National Research Council of Italy) Dr William Bin (Institute of Plasma Physics “P.Caldirola”, National Research Council of Italy) Dr Francesco Fanale (Institute of Plasma Physics “P.Caldirola”, National Research Council of Italy) Dr Ferran Albajar (European Joint Undertaking for ITER and the Development of Fusion Energy) Dr Tullio Bonicelli (European Joint Undertaking for ITER and the Development of Fusion Energy) Dr Francisco Sánchez (European Joint Undertaking for ITER and the Development of Fusion Energy)

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