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In the frame of development of the ITER electron cyclotron wave (ECW) system, the development of a 170 GHz, 2 MW CW coaxial gyrotron with depressed collector is foreseen in the European Technology Workplan, during the 6th Framework Program (2003-2006). Such development relies on the availability of a test stand capable of providing the electrical energy and cooling capacity. This test stand will possibly be used, in a later stage, for the component test of the ITER ECW system.

This paper first presents the main parameters of this new coaxial gyrotron. Then we describe the test stand itself, including the general requirements for testing and evaluating the behaviour of the RF source. Then follows a description of the electrical system design. Compared to the ITER reference design, the test stand emphasises the requirement of flexibility, which is necessary during the development of the gyrotron. The additional electrical equipment, such as the body power supply or the series solid-state switch, is included in the overview of the electrical system.

The cooling system will be an important part of the design study. Indeed, the design efficiency of such depressed collector gyrotron is ~50%, implying that more than 4 MW of continuous heat dissipation and evacuation by the cooling equipment. The specifications of the cooling system must also comply with ITER reference design values.

Additional information

Authors: FASEL D ET AL, Association EURATOM-Confédération Suisse, Centre de Recherches en Physique des Plasmas, École Polytechnique Fédérale de Lausanne (CH);BONICELLI T, EFDA-CSU, Max Planck Institut, Garching (DE);CLEASEN T R, ENEA, Frascati (IT);SANTINELLI M, ENEA, Frascati (IT);STERK A, FOM-Institute for Plasma Phyiscs - Rijnhuizen, Association Euratom-FOM, Nieuwegein (NL);VERHOEVEN T, FOM-Institute for Plasma Phyiscs - Rijnhuizen, Association Euratom-FOM, Nieuwegein (NL)
Bibliographic Reference: An oral report given at: 22nd Symposium on Fusion Technology (SOFT) Organised by: Association Euratom-Tekes Held at: Helsinki (FI), 9-13 September 2002
Availability: Available online at: It is also published in report LRP 733/02, available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6
Record Number: 200215663 / Last updated on: 2002-12-16
Original language: en
Available languages: en