Development of Steady-State 2 MW, 170 GHz Gyrotrons for ITER


B. Piosczyk 1),  A. Arnold 1a), G. Dammertz 1), R. Heidinger 1), S. Illy 1), J. Jin 1),

K. Koppenburg 1), W. Leon­hardt 1), G. Neffe 1), T. Rzesnicki 1), M. Schmid 1),

M. Thumm 1a), X. Yang 1),

S. Alberti 2), R. Chavan 2), D. Fasel 2), T. Goodman 2), M. Henderson 2), J.P. Hogge 2),

M.Q. Tran 2), I. Yovchev 2),

V. Erckmann 3), H.P. Laqua 3), G. Michel 3),

G. Gantenbein 4), W. Kasparek 4), G. Müller 4), K. Schwörer 4),

D. Bariou 5), A. Beunas 5), E. Giguet 5), G. LeCloarec 5), F. Legrand 5), C. Liévin 5),

O. Dumbrajs 6)


1) Forschungszentrum Karlsruhe (FZK), Association EURATOM-FZK, Postfach 3640,

D-76021 Karlsruhe, Germany, (a) also Universität Karlsruhe, D-76128 Karlsruhe, Germany

2) CRPP, Ass. EURATOM-Confédération Suisse, EPFL Ecublens, Lausanne, Suisse

3) MPI für Plasmaphysik, Association EURATOM, D-17491 Greifswald, Germany

4) Institut für Plasmaforschung, Universität Stuttgart, Pfaffenwaldring 31, Stuttgart, Germany

5) Thales Electron Devices, 2 bis, Rue Latécoère, F-78941 Vélizy-Villacoublay, France

6) Helsinki University of Technology, Association EURATOM-TEKES, FIN-02015 HUT,



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Abstract. A prototype of a 1 MW, CW, 140 GHz conventional gyrotron for the W7-X stellarator in Greifswald/Germany has been tested successfully and the fabrication of series tubes started. In extended studies the feasibility for manufacturing a continuously operated high power coaxial cavity gyrotron has been demonstrated and all needed data for an industrial design has been obtained. Based on this results the fabrication of a first prototype of a 2 MW, CW, 170 GHz coaxial cavity gyrotron started recently in cooperation between European research institutions and European tube industry. The prototype tube is foreseen to be tested in 2006 at CRPP Lausanne where a suitable test facility is under construction.