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TY - CONF AU - Micolon, F. AU - Bourcey, N. AU - Deschamps, J-B. AU - Herty, A. AU - Le Naour, S. AU - Mikkola, T. AU - Parma, V. AU - Ramos, D. AU - Rude, V. AU - Sosin, M. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Mechanical Consolidation of the LHC Inner Triplet Magnet Supporting System for Remote Alignment J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - Given the high radiation area and the tight alignment tolerances, the LHC inner triplet magnets were designed to be realigned remotely using motorized supporting jacks. However, during run 2 the LHC triplet realignment system started to show an unexpected behavior with erratic load variations on the magnet supporting jacks when operated. It was then decided to freeze any further realignment of the LHC triplet magnet for the remainder of the run. Subsequently, a project team was set up at CERN to understand better the conditions leading to such unexpected behavior and to study and propose a technical consolidation for the realignment system of the LHC triplet magnet. A fully instrumented magnet string using LHC triplet spare magnets was assembled and used at CERN to provide a realistic test bench for this study. This paper reports on the work undertaken to study the triplet magnet overall realignment kinematic, the findings on the readjustment system malfunction and details the consolidation solution implemented for the next LHC run PB - JACoW Publishing CP - Geneva, Switzerland SP - 2207 EP - 2209 KW - alignment KW - vacuum KW - GUI KW - quadrupole KW - ECR DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-TUPAB308 UR - https://jacow.org/ipac2021/papers/tupab308.pdf ER -