Studies of Thermal Loads on Collimators for HL-LHC Optics in Case of Fast Losses

The new layouts for the HL-LHC pose new challenges in terms of proton loads on the collimators around the ring, in particular for the ones in experimental regions that become critical with squeezed optics. New layouts are under consideration, which foresee updated collimation schemes. Simulations of halo loads for the case of fast failures have been setup with SixTrack in order to determine beam loss distributions for realistic error scenarios. The particle tracking studies are used as starting conditions for FLUKA to evaluate the thermal loads on collimators in case of failures. In this paper, the preliminary studies performed for the baseline HL-LHC optics layouts are presented.