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TY - CONF AU - Turaj, K. AU - Arnaudon, L. AU - Baudrenghien, P. AU - Brunner, O. AU - Butterworth, A.C. AU - Gerigk, F. AU - Karppinen, M. AU - Maesen, P. AU - Montesinos, E. AU - Peauger, F. AU - Rosaz, G.J. AU - Shaposhnikova, E.N. AU - Smekens, D. AU - Taborelli, M. AU - Therasse, M. AU - Timko, H. AU - Valuch, D. AU - Valverde Alonso, N. AU - Venturini Delsolaro, W. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Operation Experience with the LHC ACS RF System J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - The LHC accelerating RF system consists of two cryomodules per beam, each containing four single-cell niobium sputtered 400.8 MHz superconducting cavities working at 4.5 K and an average accelerating voltage of 2 MV. The paper summarises the experience, availability and evolution of the system within 10 years of operation. The lessons learned from the successful replacement and re-commissioning of one cryomodule with a spare module, and the recent re-test of the originally installed module on the test stand are also included. Finally, a review of currently launched spare cavity production and long-term developments are presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 911 EP - 914 KW - cavity KW - cryomodule KW - operation KW - injection KW - MMI DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP031 UR - http://jacow.org/srf2019/papers/thp031.pdf ER -