LHC cryogenics - perspectives for RUN2 operation

The first period of LHC cryogenic operation between 2008 and 2013 allowed gaining practical knowledge about the machine operational behaviour. The cryogenic system operation scenario for Run1 was defined and set regarding minimization of potential failures and energy consumption. Tuning of the cooling power in local cooling loops was adjusted according to the requirements for the heat extraction. The Long Shutdown 1 (LS1), started on the beginning of 2013, allowed for maintenance, upgrade and necessary repairs on the LHC cryogenic installation focusing on preparation for post LS1 accelerator run. In order to provide required cooling power, configuration of the cryoplants for Run2 will be set differently than for Run1, the available margins will change. The constraints imposed by beam-induced heating during scrubbing run or normal Run2 have been analyzed. In case of installation failures, the critical spare components management will allow for direct replacement of faulty elements of the installation in most adapted time. The mitigation of failures can be also done by cryogenic plants reconfiguration, in some cases with impact on LHC beam operation scenarios.