5th ICFA Beam Dynamics Mini-Workshop on Machine Learning for Particle Accelerators

EPU Coupling Correction by Bayesian Optimization

Not scheduled

20m

80/1-001 - Globe of Science and Innovation - 1st Floor (CERN)

Poster Surrogate Modelling and Digital Twins Poster session

Speaker

Mau-Sen Chiu (National Synchrotron Radiation Research Center)

Description

The APPLE-II types of elliptically polarized undulators (EPU) are extensively utilized in synchrotron light sources. Manufacturing imperfections in the EPU inevitably lead to the creation of a residual skew quadrupole component, which couples horizontal betatron oscillation and dispersion to the vertical plane, consequently altering the vertical beam size. To regulate the vertical beam size, EPU is equipped with a pair of skew quadrupole magnets to compensate for the residual skew quadrupole compo-nent of the EPU. The paper focuses on building a 2D coupling feed-forward table by using Bayesian optimiza-tion at the Taiwan Photon Source (TPS)