Pre-Cycles of the LHC Magnets during Operation

Both superconducting and resistive magnets need a proper pre-cycling to have a reproducible behaviour, namely to provide the same field at the same level of current. Depending on the type of magnet, the type of pre-cycle stems from different physical phenomena, and reproducibility can be obtained through different pre-cycle strategies. For the Large Hadron Collider (LHC), the final goal is to have reproducibility within the tight beam dynamics requirements (of the order of 10-4) with a minimum pre-cycle time. Too long pre-cycle reduces the time available for the beam collisions, i.e. the integrated luminosity. In this report we give the pre-cycle strategy adopted for the LHC in 2009 an 2010.