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TY - CONF AU - Maclean, E.H. AU - Giovannozzi, M. AU - Persson, T.H.B. AU - Tomás García, R. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - A Mechanism for Emittance Growth Based on Non-Linear Islands in LHC 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 - Landau octupoles are used in the LHC to prevent coherent instabilities of the circulating beam. The reduction of their strength occurring during the energy ramp can transport particles in nonlinear islands to larger amplitude. This has the potential to lead to emittance growth and to beam-losses. Beam-based studies and simulations of emittance growth during Landau octupole ramps performed in the LHC are presented to explore this mechanism in more detail. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4082 EP - 4085 KW - octupole KW - emittance KW - ECR KW - operation KW - resonance DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-THPAB169 UR - https://jacow.org/ipac2021/papers/thpab169.pdf ER -