High Power Laser and Particle Beams, Volume. 36, Issue 8, 084002(2024)
Development of a superconducting longitudinal gradient bend prototype for Hefei Advanced Light Facility storage ring
Figures & Tables(15)
Fig. 2. Sketch of the SLGB (superconducting longitudinal gradient bend) prototype
Fig. 3. Simulated longitudinal magnetic field profile of the SLGB protype
Fig. 4. Relative deviation of the longitudinal magnetic field integral within a specific transverse range from the longitudinal magnetic field integral at the symmetrical center (different colors denote different numerical values)
Fig. 11. Partial data from magnetic field measurements of the SLGB prototype
Table 1. Main parameters of the NbTi wire
View tableView in ArticleTable 1. Main parameters of the NbTi wire
bare wire size insulated wire size Cu:NbTi ratio critical current at 4.2 K, 7 T/A number of filaments filament diameter/μm RRR (273 K/10 K) 1.20 mm×0.75 mm 1.28 mm×0.83 mm 1.3 ≥566 630 27.6 ≥566
Table 2. Main design parameters of the SLGB prototype
View tableView in ArticleTable 2. Main design parameters of the SLGB prototype
magnet type yoke thickness/mm pole gap/mm pole length along beam/mm pole length transverse to beam/mm turns per layer number of layers conductor length per coil/m operating current/A peak field at conductor/T stored energy/kJ racetrack coils, DT4 yoke and pole 120 46 39 109 38 36 500 252 6.35 14
Table 3. Calculation results for the heat load of cryogenic device
View tableView in ArticleTable 3. Calculation results for the heat load of cryogenic device
source of thermal load first stage cold head thermal load/W second stage cold head thermal load /W G10 rods 0.15×4 0.07×4 thermal radiation 2.3 0.2 current leads (thermal conduction) 8×2 0.1×2 current leads (joule heat) 10×2 — pipes 4 0.1 gas 0.4 0.03 else 1 0.1 total 44.3 0.71
Table 4. Comparison between measured results and simulation results of the SLGB prototype
View tableView in ArticleTable 4. Comparison between measured results and simulation results of the SLGB prototype
Iin/A Bp/T ∫Bydz/(T·m) measurement 195.56 4.5245 0.4004 original simulation 251.40 4.8985 0.3992 updated simulation 240.41 4.6019 0.4000
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Chao Chen, Shuangsong Du, Rui Hu, Weimin Li, Lin Wang, Guangyao Feng. Development of a superconducting longitudinal gradient bend prototype for Hefei Advanced Light Facility storage ring[J]. High Power Laser and Particle Beams, 2024, 36(8): 084002
Paper Information
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Received: Nov. 17, 2023
Accepted: Mar. 9, 2024
Published Online: Aug. 8, 2024
The Author Email: Lin Wang (wanglin@ustc.edu.cn), Guangyao Feng (fenggy@ustc.edu.cn)
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