2017/03/28 by А. Романов, Romanov, A., Dean Edstrom +13
Engineering · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Non-Destructive Testing Techniques #Optical Systems and Laser Technology
paper · pdf · doi:10.48550/arxiv.1703.09757
openalex publication_date 2017/03/28 · openalex created_date 2017/04/07 · openalex updated_date 2026/07/28
Precise beam based measurement and correction of magnetic optics is essential for the successful operation of accelerators. The LOCO algorithm is a proven and reliable tool, which in some situations can be improved by using a broader class of experimental data. The standard data sets for LOCO include the closed orbit responses to dipole corrector variation, dispersion, and betatron tunes. This paper discusses the benefits from augmenting the data with four additional classes of experimental data: the beam shape measured with beam profile monitors; responses of closed orbit bumps to focusing field variations; betatron tune responses to focusing field variations; BPM-to-BPM betatron phase advances and beta functions in BPMs from turn-by-turn coordinates of kicked beam. All of the described features were implemented in the Sixdsimulation software that was used to correct the optics of the VEPP-2000 collider, the VEPP-5 injector booster ring, and the FAST linac.