Thermomechanical stresses on the beam window

The Centre for Advanced Studies, Research and Development in Sardinia (CRS4) is participating in an Italian R and D programme, together with Ansaldo, the ENEA and the INFN, devoted to the design of a 80 MW prototype of the energy amplifier. The use of advanced numerical tools has been of practical support in the design of critical elements of the machine such as the fuel element and the beam target. The aim of this work is to study the sensitivity of beam window stresses to the beam distribution, size and interruption. In order to compute thermal stresses, the heat deposition in the window and in the coolant generated by the interaction with the proton beam is calculated and used as input data for the fluid dynamic simulation of the natural convection flow of the target coolant. (author)