Front steering configuration with internal optics for the ECRH ITER Upper Launcher

Amongst the possible improvements in the internal optics for the ECRH Upper Launcher of ITER, which is assessed and close to com-pletion, a full quasi-optical design for the launcher has been investigated and here proposed. This option is obtained with the replacement of the mitre bends with free space mirrors and can provide improvements in terms of a reduction of the power density with respect to the mitre bends case, additional flexibility and transmission efficiency, with an overall downgrading of the costs of the launcher. In this work we present the general ideas of this proposal, starting from the present Front Steering (FS) design and following a matching approach from given final beams and positions, in order to minimize impact on design.