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TY - CONF AU - Karastathis, N. AU - Fuchsberger, K. AU - Hostettler, M. AU - Papaphilippou, Y. AU - Pellegrini, D. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Crossing Angle Anti-Leveling at the LHC in 2017 J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - In 2017, LHC incorporated in operation an anti-leveling procedure of adapting in steps the crossing angle of the colliding beams to increase the integrated luminosity. In this paper, we present the Dynamic Aperture simulations that were employed to identify the operational margins, and therefore define the leveling steps. The results are complemented by observations from nominal operation and projections for the 2018 operation. Additional anti-leveling techniques, investigated in dedicated machine studies are also discussed PB - JACoW Publishing CP - Geneva, Switzerland SP - 184 EP - 187 KW - luminosity KW - operation KW - proton KW - simulation KW - experiment DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-MOPMF040 UR - http://jacow.org/ipac2018/papers/mopmf040.pdf ER -