Contribution to the design of the main transmission line for the ITER relevant LHCD system

In the frame of the EFDA Task HCD-08-03-01 (EU contribution to the ITER LHCD Development Plan) the preliminary design of the LHCD system, described in the Detailed Design Description DDD 5.4 LH (2001), has been revised to take into account progresses on technology and on knowledge. In particular a revised layout of the ITER machine and the successful development of a prototype klystron at 5 GHz with a target RF power of 500 kW CW have determined significant changes in the design of the main transmission lines and on the modularity of the launcher.