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Precise beam based measurement and correction of magnetic optics is essentialfor the successful operation of accelerators. The LOCO algorithm is a provenand reliable tool, which in some situations can be improved by using a broaderclass of experimental data. The standard data sets for LOCO include the closedorbit responses to dipole corrector variation, dispersion, and betatron tunes.This paper discusses the benefits from augmenting the data with four additionalclasses of experimental data: the beam shape measured with beam profilemonitors; responses of closed orbit bumps to focusing field variations;betatron tune responses to focusing field variations; BPM-to-BPM betatron phaseadvances and beta functions in BPMs from turn-by-turn coordinates of kickedbeam. All of the described features were implemented in the Sixdsimulationsoftware that was used to correct the optics of the VEPP-2000 collider, theVEPP-5 injector booster ring, and the FAST linac.

Correction of magnetic optics and beam trajectory using LOCO based algorithm with expanded experimental data sets