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(CT-7Rb) A 2 MW, CW, 170 GHz Gyrotron for ITER

B.P. Piosczyk¹⁾, S. Alberti²⁾, A. Arnold¹⁾³⁾, E. Borie¹⁾, H. Budig¹⁾, G. Dammertz¹⁾, O. Drumm¹⁾³⁾, O. Dumbrajs⁸⁾, V. Erckmann⁴⁾, E. Giguet⁷⁾, T. Goodman²⁾, R. Heidinger¹⁾, J.P. Hogge²⁾, S. Illy¹⁾, M.V. Kartikeyan¹⁾, W. Kasparek⁵⁾, K. Koppenburg¹⁾, M. Kuntze¹⁾, G. LeCloarec⁷⁾, C. Lievin⁷⁾, R. Magne⁶⁾, G. Michel⁴⁾, G. Müller⁵⁾, M. Thumm¹⁾³⁾, M.Q. Tran²⁾, X. Yang^1)
 
1) Forschungszentrum Karlsruhe, Association EURATOM-FZK, Karlsruhe, Germany
²⁾ Centre de Recherche en Physique des Plasmas, Association Euratom-Confédération Suisse, Lausanne, Suisse
³⁾ Universität Karlsruhe, Institut für Höchstfrequenztechnik und Elektronik, Karlsruhe, Germany
⁴⁾ Max-Planck-Institut für Plasmaphysik, Teilinstitut Greifswald, Association EURATOM, Greifswald, Germany
⁵⁾ Institut für Plasmaforschung, Universität Stuttgart, Stuttgart, Germany
⁶⁾ CEA/Cadarache, France
⁷⁾ Thales Electron Devices, Vélizy-Villacoublay, France
⁸⁾ Department of Engineering Physics and Mathematics, Helsinki University of Technology, Association EURATOM TEKES, Espoo, Finland

Abstract.  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.

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