Analysis of Failures of the LHC Collimators During the 2010-2013 Operation

The LHC collimation system must be available in all phases of the machine operation in order to handle the high stored beam energies. The system availability is therefore crucial to achieve an efficient LHC operation. The collimation system has proved to work reliably in the first years of LHC operation, with total stored energies up to 140 MJ. The impact on the machine availability has been very limited. The analysis of collimation system faults affecting the 2010-2013 LHC operation is reviewed with the aim to identify possible further improvements for the future.