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@inproceedings{chen:ipac2021-wepab264, author = {C. Chen and Z.H. Bai and G.Y. Feng and Z.L. Ren and Zh.X. Tang and L. Wang and H. Xu}, % author = {C. Chen and Z.H. Bai and G.Y. Feng and Z.L. Ren and Zh.X. Tang and L. Wang and others}, % author = {C. Chen and others}, title = {{MOGA Optimization of Superconducting Longitudinal Gradient Bend Based on NbTi Wire}}, booktitle = {Proc. IPAC'21}, pages = {3257--3260}, eid = {WEPAB264}, language = {english}, keywords = {solenoid, emittance, lattice, storage-ring, radiation}, venue = {Campinas, SP, Brazil}, series = {International Particle Accelerator Conference}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {08}, year = {2021}, issn = {2673-5490}, isbn = {978-3-95450-214-1}, doi = {10.18429/JACoW-IPAC2021-WEPAB264}, url = {https://jacow.org/ipac2021/papers/wepab264.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB264}, abstract = {{Multi-bend achromat lattices with unit cells have been used in diffraction-limited storage ring designs. The longitudinal gradient bend can reduce the horizontal emittance below the theoretical minimum of a given magnet structure, and generally the horizontal emittance reduces with the peak field grows. Therefore superconducting longitudinal gradient bend (SLGB) can produce higher peak field value and quasi-hyperbolic field profile to minimize emittance at location of radiation and generate better hard X-rays. NbTi conductor, rather than Nb₃Sn conductor, is selected to keep the design and manufacture of SLGB magnet as simple as possible. In this paper, how the field profiles of race-track type coil and solenoid coil change with their geometric parameters is studied, and multi-objective genetic algorithm is used to optimize SLGB magnet structure considering Hefei Advanced Light Facility lattice design demand and NbTi critical current.}}, }