Progress in the design of the ICRF launcher for DTT

Following a concept assessment a launcher with three double folded straps, able to sensibly reduce the parallel electric field, has been chosen for the DTT ICRH system. The present analysis has been performed on the single null scenario. The launcher mouth has been adapted for matching as much as possible the DTT Last Closed Flux Surface profile, thus resulting in a double curved launcher, both in the toroidal and in the poloidal directions. Three different launcher configurations have been examined from the Radiofrequency point of view by the computer code High Frequency Structures Simulator (HFSS), developed by ANSYS. The paper reports the analysis results.