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TY - CONF AU - Carra, F. AU - Accettura, C. AU - Beghi, M. AU - Bertarelli, A. AU - Bregliozzi, G. AU - Cattenoz, G. AU - Guardia Valenzuela, J. AU - Redaelli, S. AU - Taborelli, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Ultra-High Vacuum Characterization of Molybdenum-Carbide Graphite for HL-LHC Collimators J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In view of the High-Luminosity upgrade of the Large Hadron Collider (LHC) collimation system, a family of novel molybdenum-carbide graphite (MoGr) composites was developed to meet the challenging requirements of HL-LHC beam-halo collimation, in particular the electrical conductivity and thermo-mechanical performances. The Ultra-High Vacuum (UHV) behaviour of this material was extensively characterized to assess its compatibility with the accelerator’s specifications. The results presented in this paper correlate the outgassing behaviour with the microscopic features of MoGr compared to other graphite-based materials. Residual gas analysis (RGA) was exploited to optimize post-production treatments. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1078 EP - 1081 KW - vacuum KW - collimation KW - site KW - proton KW - collider DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS093 UR - http://jacow.org/ipac2019/papers/mopts093.pdf ER -