Consequences of Regular and Irregular Beam Impact on the LHC

The Large Hadron Collider (LHC) collimators must be able to withstand at 7 TeV/c the shock impact of about 8 out of the 2808 circulating bunches, as well as continuous beam losses for reduced beam lifetimes. These are strict requirements, given the 350 MJ of stored beam energy in the LHC and the small spot size at 7 TeV/c. The consequences of beam impact on the collimators were calculated for various scenarios and then used as input to FLUKA showering studies. Detailed loss maps and shower calculations are employed to predict maximum equipment heating in the LHC cleaning insertions and the subsequent requirements for equipment design, cooling, and additional absorbers