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TY - CONF AU - Gupta, L. AU - Baturin, S. AU - Ehrlichman, M.P. AU - Kim, Y.K. AU - Maxson, J.M. AU - Meller, R.E. AU - Rubin, D. L. AU - Sagan, D. AU - Shanks, J.P. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Beam-Based Sextupolar Nonlinearity Mapping in CESR 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 order to maintain beam quality during transport through a storage ring, sextupole magnets are used to make chromatic corrections, but necessarily introduce deleterious effects such as nonlinear resonances and reduced dynamic aperture. Implementing intricate sextupole distributions to mitigate these effects will rely on precision beam-based measurement of the applied sextupole distribution. In this work, we generalize previous sextupole mapping techniques by using resonant phase-locked excitation of the beam at the Cornell Electron Storage Ring (CESR), which accounts for variations in the normal mode tunes on a turn by turn basis. The methods presented here are applied to simulation and actual turn by turn data in CESR for both simplified and realistic sextupole distributions. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3565 EP - 3568 KW - sextupole KW - simulation KW - experiment KW - resonance KW - lattice DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-THPAK137 UR - http://jacow.org/ipac2018/papers/thpak137.pdf ER -