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TY - CONF AU - Maclean, E.H. AU - Carlier, F.S. AU - Giovannozzi, M. AU - Langner, A. AU - Mönig, S. AU - Persson, T. AU - Skowroński, P.K. AU - Tomás, R. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Non-Linear Errors in the Experimental Insertions of the LHC J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - Correction of nonlinear magnetic errors in low-β insertions can be of critical significance for the operation of a collider. This is expected to be of particular relevance to LHC Run II and the HL-LHC upgrade, as well as to future colliders such as the FCC. Current correction strategies for these accelerators have assumed it will be possible to calculate optimized local corrections through the insertions using a magnetic model of the errors. To test this assumption the nonlinear errors in the LHC experimental insertions have been examined via feed-down and amplitude detuning. It will be shown that while in some cases the magnetic measurements provide a sufficient description of the errors, in others large discrepancies exist which will require beam-based correction techniques. PB - JACoW CP - Geneva, Switzerland SP - 3472 EP - 3475 KW - insertion KW - multipole KW - coupling KW - dipole KW - dynamic-aperture DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-THPMR038 UR - http://jacow.org/ipac2016/papers/thpmr038.pdf ER -