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TY - CONF AU - Baribeau, C.K. AU - Dallin, L.O. AU - Helfrich, J.M. AU - Pedersen, T.M. AU - Sigrist, M.J. AU - Wurtz, W.A. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Simulated and Measured Magnetic Performance of a Double APPLE-II Undulator at the Canadian Light Source J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - Assembly and shimming are underway for a double APPLE-II type elliptically polarized undulator (i.e. two magnet arrays installed side by side on a single support structure) at the Canadian Light Source. The device is planned to be installed in spring 2017. Extensive preparation was done prior to device assembly, particularly in development of a simulated annealing algorithm for magnet virtual shimming, as well as assembly procedures that minimized positional errors in the installed magnet blocks. In this paper we present measurements taken throughout the shimming process, and compare with predictions from a RADIA model where each magnet block was magnetized uniquely according to individual Helmholtz coil measurements. PB - JACoW CP - Geneva, Switzerland SP - 4025 EP - 4027 KW - undulator KW - multipole KW - polarization KW - photon KW - dipole DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-THPOW037 UR - http://jacow.org/ipac2016/papers/thpow037.pdf ER -