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TY - UNPB AU - Mether, L. AU - Iadarola, G. AU - Rumolo, G. ED - Schaa, Volker RW TI - Simulations of Electron-Ion Effects and Relevance to LHC Experience in 2017 J2 - Proc. of HB2018, Daejeon, Korea, 17-22 June 2018 C1 - Daejeon, Korea T2 - ICFA Advanced Beam Dynamics Workshop T3 - 61 LA - english AB - Operation of the LHC in 2017 was severely affected by recurrent beam aborts triggered by beam losses in one of its arc cells. The losses were correlated with quickly developing transverse coherent oscillations, which in most cases caused the beam dumps due to particle losses in the cleaning insertions. The events are thought to have been caused by air that was frozen on the beam screen surface in the concerned location, and which through a complex sequence of events could give rise to a localized high gas density. In this contribution we describe efforts towards modelling the observed coherent effects through the interaction of the beam with the induced pressure bump. PB - JACoW Publishing CP - Geneva, Switzerland ER -