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TY - CONF AU - Furuseth, S.V. AU - Amorim, D. AU - Antipov, S. A. AU - Buffat, X. AU - Mounet, N. AU - Métral, E. AU - Pieloni, T. AU - Salvant, B. AU - Tambasco, C. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan TI - Instability Latency in the LHC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Partile Accelerator Conference T3 - 10 LA - english AB - The Large Hadron Collider (LHC) has experienced multiple instabilities that occur between minutes and hours after the last modification of the machine settings. The existence of instabilities with high latency has been reproduced also in simulations. Dedicated experiments, injecting a controlled noise into the beam, have now been performed to discover the dependence of this latency on key parameters. The results seem compatible with a mechanism linked to a steady and slow modification of the transverse beam distribution leading to a loss of Landau damping. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3204 EP - 3207 KW - octupole KW - experiment KW - feedback KW - damping KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS044 UR - http://jacow.org/ipac2019/papers/wepts044.pdf ER -