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Abstract

LH waves experimentally exhibit the highest Current Drive efficiency at low plasma temperature, therefore they are the most suitable candidates for controlling the current profile in the off axis part of ITER Steady State plasmas. For this purpose, a 5 GHz, 20 MW CW LH system has been designed, that relies on a generator made of 24 klystrons, 1 MW each, 60 metres long circular oversized transmission lines, one antenna, based on the Passive Active Multijunction (PAM) concept. High reliability of the launcher is achieved, by limiting the power density to 33 MW/m2. Together with the overall system description, the results of different studies are reported: RF computation, launcher coupling properties, thermal analysis, mechanical stress caused by disruption, neutron activation, and acceleration of electrons in the antenna near field.
The PAM concept has already been tested on the FTU tokamak confirming that its coupling properties are as good as expected even near the cut-off electron density. A PAM is presently under design for testing this launcher on ITER like plasmas with Elmy edge and large separatrix-launcher clearance on JET. On Tore Supra, a PAM is under construction to test the technology on long pulse operations (1000 s) as needed on ITER. In the frame of Tore Supra Cimes Project, a 3.7 GHz 750 kW CW klystron is being realised.

Additional information

Authors: BIBET PH, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BEAUMONT B, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);DELPECH L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);EKEDAHL A, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);KAZARIAN F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);LITAUDON X, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);PROU M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BELO J, Associacao EURATOM-IST, Centro de Fusão Nuclear, Instituto Superior Técnico, Lisbon (PT);BIZARRO J, Associacao EURATOM-IST, Centro de Fusão Nuclear, Instituto Superior Técnico, Lisbon (PT);GRANUCCI G, Istituto di Fisica del Plasma, EURATOM�ENEA�CNR Association Milano (IT);KUZIKOV S, Institute of Applied Physics, Nizhny Novgorod (RU);MAILLOUX J, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);MIRIZZI F, Associazione Euratom-ENEA sulla Fusione, Centro.Richerche Energia ENEA-Frascati, Frascati (IT);PERICOLI V, Associazione Euratom-ENEA sulla Fusione, Centro.Richerche Energia ENEA-Frascati, Frascati (IT);TUCCILLO A, Associazione Euratom-ENEA sulla Fusione, Centro.Richerche Energia ENEA-Frascati, Frascati (IT);RANTAMÄKI K, Association EURATOM-TEKES, Helsinki University of Technology (FI)
Bibliographic Reference: An oral paper given at: 21st Symposium on Fusion Engineering Organised by: Oak Ridge National Laboratory, Oak Ridge (US) Held at Knoxville (US)
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200518344 / Last updated on: 2005-09-26
Category: PUBLICATION
Original language: en
Available languages: en
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