Beam gas loss rates in the LHC

We report on detailed simulations and first observations of beam-gas rates in the LHC. For the simulations, a set of comprehensive tools has been set up, which incorporate pressure maps, collimator settings, and beam optics. The simulations include both elastic and inelastic beam-gas events in the arcs and long straight sections of the LHC. This provides, amongst other things, realistic collimator loss distributions, fluxes of secondary particles into the experiments and multi-turn tracking of elastic event residues.