51873

A 2 MW, CW, 170 GHz GYROTRON FOR ITER

B. Piosczyk^1a, S. Alberti², A. Arnold^1a,3, E. Borie^1a, H. Budig^1a, G. Dammertz^1a,

O. Dumbrajs⁸, O. Drumm^1a,3, V. Erckmann⁴, E. Giguet⁷, T. Goodman², R. Heidinger^1b,

J.P. Hogge², S. Illy^1a, M.V. Kartikeyan^1a, W. Kasparek⁵, K. Koppenburg^1a, M. Kuntze^1a,

G. LeCloarec⁷, C. Lievin⁷,R. Magne⁶, G. Michel⁴, G. Müller⁵, M. Thumm^1a,3, M.Q. Tran²and X. Yang^1a

1Forschungszentrum Karlsruhe, Association EURATOM-FZK,
^aInstitut für Hochleistungsimpuls- und Mikrowellentechnik, ^bInstitut für Materialforschung I ,
Postfach 3640, D-76021 Karlsruhe, Germany,

^{2Centre de Recherche en Physique des Plasmas, Association Euratom-Confédération Suisse, EPFL Ecublens, CH-1015 Lausanne, Suisse
^{3Universität Karlsruhe, Institut für Höchstfrequenztechnik und Elektronik, Kaiserstr. 12, D-76128 Karlsruhe, Germany
^{4Max-Planck-Institut für Plasmaphysik, Teilinstitut Greifswald, Association EURATOM,
Wendelsteinstr. 1, D-17491 Greifswald, Germany
^{5Institut für Plasmaforschung, Universität Stuttgart, Pfaffenwaldring 31, D-70569 Stuttgart, Germany
6CEA/Cadarache, 13108 Saint Paul-lez-Durance Cédex, France
7Thales Electron Devices, 2 Rue de Latécoère, F-78141 Vélizy-Villacoublay, France
^{8 Department of Engineering Physics and Mathematics, Helsinki University of Technology,
Association EURATOM TEKES, FIN-02150 Espoo, Finland.
e-mail: bernhard.piosczyk@ihm.fzk.de}}}}}

Within the developmental work on coaxial cavity gyrotrons, the feasibility for fabrication of a 2 MW, CW, 170 GHz tube has been demonstrated and all the information necessary for a technical design and industrial manufacturing of such a tube has been obtained. The usability of the components for CW operation and their compatibility with technical restrictions has been proven. A suitable cavity mode has been selected and a collector has been designed. In addition, an integrated design of the tube has been performed. The expected technical problems are comparable with the conditions of the 1 MW, CW, 140 GHz conventional gyrotron for the W7-X stellarator which has been developed and successfully tested in close collaboration between Euratom associations with the European industry. Based on this experience as a first step towards a 2 MW, CW, 170 GHz coaxial gyrotron, a technical design is planned to be performed within the well established European cooperation. The recent results of the European gyrotron development in particular with respect to the development of gyrotrons with 2 MW microwave output power will be presented and discussed.