Russian Particle Accelerator Conference (RuPAC'23)

VEPP-4M linear optics correction using orbit response matrices

11 Sep 2023, 16:40

20m

Conference Hall (Budker INP)

Oral Colliders Colliders 2

Speaker

Rasim Mamutov (Budker Institute of Nuclear Physics, Novosibirsk)

Description

This paper presents procedures and techniques for correcting the linear optics of the VEPP-4M collider. The accelerator structure investigation is based on the measurement and analysis of orbit response matrices (ORM) and optical functions reconstructed from turn-by-turn data. Having no technical description of quadrupole lenses and corrector magnets, we have calibrated their current dependencies of magnetic strengths and fields, respectively. Relative to the reference orbit, quadrupole shifts in each plane have been obtained by using the beam-based alignment (BBA) technique. The collider optics have been corrected and calibrated at the injection energy. A software combining automated optical functions measurement and correction has been developed and successfully implemented at VEPP-4M.