Experimental Crosscheck of Algorithms for Magnet Lattice Correction

Victor Smaluk, Weiming Guo, Yoshiteru Hidaka, Yongjun Li, Guimei Wang, Lingyun Yang, Xi Yang, Schaa, Volker RW (Ed.), Petit-Jean-Genaz, Christine (Ed.), Kim, Dong Eon (Ed.), Kim, Kyung Sook (Ed.), Ko, In Soo (Ed.)
2016
Performance, capabilities and limitations of various algorithms for linear magnet optics correction have been studied experimentally at NSLS-II. For the crosscheck, we have selected 4 algorithms based on turn-by-turn beam position analysis: weighted correction of betatron phase and amplitude, independent component analysis, model-independent analysis, and driving-terms-based linear optics characterization. A LOCO algorithm based on closed orbit measurement has been used as a reference. For the
more » ... reference. For the correction, either iterative solving of linear problem (matrix inversion with singular-value decomposition) or variational optimization has been used. For all the algorithms, accuracy limitations and convergence of linear lattice correction are discussed.
doi:10.18429/jacow-ipac2016-thpmr008 fatcat:kejfngw33febxalbw4hx2i6bzm