JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Zhu, J. AU - Liang, D.H. AU - Shi, Y. AU - Wang, C.G. AU - Zhang, M. ED - Schaa, Volker R.W. ED - Bian, Lin ED - Chen, Zhichu ED - Dong, Yuhui ED - He, Ping TI - Studies on the Influences of Longitudinal Gradient Bending Magnet Fabrication Tolerances on the Field Quality for SILF Storage Ring J2 - Proc. of MEDSI2023, Beijing, China, 06-10 November 2023 CY - Beijing, China T2 - International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation T3 - 12 LA - english AB - The advanced storage ring of 4th generation synchrotron radiation facility, known as the diffraction-limited storage ring (DLSR), is based on multi-bend achromat (MBA) lattices, which enable an emittance reduction of one to two orders of magnitude pushing beyond the radiation brightness and coherence reached by the 3rd generation storage ring. The longitudinal gradient bending (LGB) magnets, with multiple magnetic field stages in beam line direction, are required in the DLSR to reduce the emittance. The permanent magnet based LGB magnets are selected for the Shenzhen Innovation Light-source Facility (SILF) due to the advantages of operation economy, compactness and stability compare to the electro-magnet. In this paper, the influences of typical LGB magnet fabrication tolerances on the field qualities are presented using a dedicated parameterized finite element (FE) model, such as the poles height and width tolerances, the pole tips parallelism (in different orientations) and etc. Meanwhile the influences of permanent magnets discreteness and the magnetic forces (between top and bottom pole tips) induced yoke deformation on the field qualities are studied and presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 296 EP - 298 KW - HOM KW - storage-ring KW - radiation KW - extraction KW - synchrotron DA - 2024/07 PY - 2024 SN - 2673-5520 SN - 978-3-95450-250-9 DO - doi:10.18429/JACoW-MEDSI2023-THPPP013 UR - https://jacow.org/medsi2023/papers/thppp013.pdf ER -