McAteer, M.; Rehm, G.; Markus, R.: Optics corrections and performance improvements in the Bessy II Booster. In: Editorial Board: Fulvia Pilat ... [Ed.] : Proceedings of the 15th International Particle Accelerator Conference (IPAC'24) : Nashville, TN, 19-24 May 2024Geneva: JACoW, 2024. - ISBN 978-3-95450-247-9, p. 3031-3034
10.18429/JACoW-IPAC2024-THPC24
Open Accesn Version

Abstract:
The BESSY II Booster has been reliably delivering beam to the storage ring for several decades. As part of an effort to better understand and control beam dynamics in the Booster, new instrumentation, including Libera Spark ERXR beam position processors, has recently been installed and commissioned. These instrumentation upgrades have enabled measurements and corrections of optics parameters throughout the acceleration ramp which were not previously possible, leading to understanding and mitigation of mechanisms for beam loss and instabilities. Here we describe the beam position measurement system, corrections to the tune and chromaticity, and the resulting improvements to the top-up operation of BESSY II.