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TY - CONF AU - Maclean, E.H. AU - Carlier, F.S. AU - Coello de Portugal, J.M. AU - Garcia-Tabares, A. AU - Giovannozzi, M. AU - Malina, L. AU - Persson, T. AU - Skowroński, P.K. AU - Tomás, R. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - New Methods for Measurement of Nonlinear Errors in LHC Experimental IRs and Their Application in the HL-LHC J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - Studies of nonlinear errors in LHC experimental insertions (IRs) during Run 1 were based upon feed-down to tune and coupling from the crossing angle orbit bumps. Useful for validating the magnetic model, this method alone is of limited use to understand discrepancies between magnetic and beam-based measurement. Feed-down from high-order multipoles is also difficult to observe. During Run 2 several alternative methods were tested in the LHC. This paper summarizes the results of these tests, and comments on their potential application to the High-Luminosity LHC upgrade. PB - JACoW CP - Geneva, Switzerland SP - 3155 EP - 3158 KW - dipole KW - resonance KW - dynamic-aperture KW - optics KW - collider DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-WEPIK093 UR - http://jacow.org/ipac2017/papers/wepik093.pdf ER -