Guidelines for an optimal design of first wall components for RFP devices

The RFX experimental results at the highest plasma current (about IMA) and for relatively long pulses (150 ms) show the presence of high power flux de nsities on the first wall, up to 40 MW/m(2) averaged on a single tile. Detailed numerical analyses have been carried out to simulate the thermal r esponse of a single tile. The results of sensitivity analyses give informat ion on the radiative and convective power flux intensities and the related first wall temperature distributions. The experimental data and the results of thermal analyses give quantitative information and qualitative guidelines for the design of an optimized firs t wall for a RFP device.