Measurement of the Energy Deposition Profile for238U Ions with Energy 500 and 950 MeV/U in Stainless Steel and Copper Targets

Sub-millimetre wall thickness is foreseen for the vacuum tubes in the magnets of the superconducting dipoles of the SIS100 and SIS300 of the FAIR Project. The Bragg peak of the energy deposition by the U ions in these walls may lie dangerously close to the superconducting cables. Thus the precise knowledge of the dE/dx profile is essential for estimating the heat load by the lost ions in the vicinity of the superconducting wires. Here we present the preliminary results of the measurement of the U ion beam energy deposition profile in Cu and stainless steel targets and compare the measured data with the dE/dx calculations using different codes.