Speaker
Dr
Ferran Albajar
(Fusion for Energy)
Description
The EU gyrotron for the ITER Electron Cyclotron heating system has been developed in coordinated efforts from several EU institutions (organized in the EGYC European Gyrotron Consortium, TED and F4E) and under the supervision of ITER Organization Central Team. The design of the ITER gyrotron is based on the EU expertise in the series production of high power and long pulse gyrotrons for the W7-X Stellarator, and incorporates key improvements recently validated to enhance the quality of the electron beam at the cavity and the output RF beam at the window. Following a risk-reducing staged approach, the design was first verified in 2015 with tests on a short pulse prototype, showing >1 MW of output RF power at the right frequency (~170.1 GHz) in stable and reproducible conditions. The electronic efficiency (~35%) obtained with the short pulse gyrotron was consistent with an ~50% output efficiency in voltage depression and in a CW electrostatic configuration. No parasitic oscillations were observed and a high quality of the output RF beam was measured (TEM00~98%). A CW gyrotron prototype was then produced with the same design of the internal RF and electronic components. The CW prototype was delivered in November 2015 to the KIT gyrotron test facility, where it will be tested in 2016. This paper presents the main experimental results from the main prototyping and qualification activities aiming to demonstrate compliance with the ITER specifications and reduce the technical risks during the series production phase.
| Country or International Organization | European Commission |
|---|---|
| Paper Number | FIP/P4-29 |
Primary author
Dr
Ferran Albajar
(Fusion for Energy)
Co-authors
Dr
Alex Bruschi
(Instituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche)
Dr
Caroline Darbos
(ITER Organization)
Dr
Christian Schlatter
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center)
Dr
Fabio Cismondi
(Fusion for Energy)
Dr
Falk Braunmueller
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma)
Dr
Francesca Cau
(Fusion for Energy)
Dr
George P. Latsas
(Faculty of Physics, National and Kapodistrian University of Athens)
Dr
Gerd Gantenbein
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Ioannis Pagonakis
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Jean-Philippe Hogge
(2Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center)
Dr
Jianbo Jin
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
John G. Chelis
(National Technical University of Athens)
Dr
John Jelonnek
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
John L. Vomvoridis
(National Technical University of Athens)
Dr
John Tigelis
(Faculty of Physics, National and Kapodistrian University of Athens)
Dr
Kostantinos Avramidis
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Lechte Carsten
(University of Stuttgart, IGVP)
Dr
Manfred Thumm
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Mark Henderson
(ITER Organization)
Dr
Markus Losert
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Martin Schmid
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Maurizio Lontano
(Instituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche)
Dr
Minh Quang Tran
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center)
Dr
Pierre-Etienne Frigot
(Fusion for Energy)
Dr
Stefan Illy
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Stefano Alberti
(Ecole Polytechnique Fédérale de Lausanne, Swiss Plasma Center)
Dr
Thorsten Kobarg
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Tomasz Rzesnicki
(Karlsruhe Institute of Technology, KIT-IHM)
Dr
Tullio Bonicelli
(Fusion for Energy)
Dr
Virgile Hermann
(Thales Electron Devices)
Dr
Walter Kasparek
(University of Stuttgart, IGVP)
Dr
William Bin
(4Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche)
Dr
Yoann Rozier
(Thales Electron Devices)
Dr
Zisis Ioannidis
(Karlsruhe Institute of Technology, KIT-IHM)
