LHC and Injector Availability: Run 2

This paper summarises machine availability of the LHC and injector complex, starting with an evaluation of the machine performance in 2018, working backwards to then appraise the whole of Run 2. The first section of this paper considers LHC; identifying operational aspects, beam mode ratios, beam dump causes, fill length, turnaround , a detailed breakdown of all faults and impacts, with notable faults and new root causes identified. The second section covers the injector complex. The final section introduces new concepts and approaches which are currently being considered for practical application in availability studies. This work has been produced and ratified by the Availability Working Group, which has compiled fault information for the period in question using the Accelerator Fault Tracker.