Speakers
Description
A 4th generation storage ring based light source is being developed in Korea since 2021. It features <60 pm rad intrinsic beam emittance, about 800 m circumference, 4 GeV e-beam energy, full energy booster injection, and more than 40 beamlines which includes more than 24 insertion device (ID) beamlines. To optimize the beam emittances, longitudinal gradient bending magnet is applied in the storage ring design. To minimize the operation costs, and to save the lattice space, Sm2Co17 based Longitudinal Gradient Bending Magnet (LGBM) is being developed following ESRF-EBS, and HEPS. It has 5 steps of field level ranging from 0.75 T~0.15 T with approximately 2 m length. In this report, the compensation scheme of temperature dependence, and field tuning to meet the bending angle, and apex points will be described.
Funding Agency
This research was supported in part by the Korean Government (MSIT: Ministry of Science and ICT) (No. RS-2022-00155836, Multipurpose Synchrotron Radiation Construction Project).
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