High Power Laser and Particle Beams, Volume. 34, Issue 12, 124002(2022)
Design and beam dynamic analysis of 270° achromatic deflection magnet system
Figures & Tables(13)
Fig. 1. Layout of the dual asymmetric 270° deflection magnet system
Fig. 2. Layout of the 270° deflection magnet system composed of three 90° magnets
Fig. 3. Variation of drift space and focal length with radius of dual asymmetric 270° deflection system
Fig. 4. Variation of beam size at the exit of the dual asymmetric 270° deflection system with the entrance and exit polar face angles
Fig. 5. Achromatic constraints of 270° deflection system composed of three 90° magnets
Fig. 6. Variation curve of beam parameters in dual-magnet asymmetric 270° deflection system
Fig. 7. Variation curve of beam parameters in 270° deflection system composed of three 90° magnets
Fig. 8. Layout of the 270° deflection magnet system composed of three non-90° magnets
Fig. 9. Variation curve of beam parameters in 270° deflection system composed of 70°+130°+70° magnets
Table 1. Structural parameters of two 270° deflection systems
View tableView in ArticleTable 1. Structural parameters of two 270° deflection systems
description magnet angle/(°) radius/m injection angle/(°) exit angle/(°) gap/m drift/m focus distance/m two magnets 165.4，104.6 0.1−1 5.73，−59.6 59.6，−14.3 0.03 0.023−0.23 0.1−1 three magnets 90，90，90 S2/1.4 10.2，10.2，10.2 10.2，10.2，10.2 0.07 0.2−1（S2） ＞2
Table 2. Changes of emittance and beam spot size at 1.5 m exit point of two 270° deflection systems under different turning radius
View tableView in ArticleTable 2. Changes of emittance and beam spot size at 1.5 m exit point of two 270° deflection systems under different turning radius
R/m two magnets three magnets drift/m σx,σy/(mm, mm) drift/m σx,σy/(mm, mm) 0.2 0.046 33.8，32.5 0.28 8.72，8.07 0.3 0.069 23.3，21.7 0.42 8.53，8.05 0.4 0.092 18.1，16.3 0.56 8.41，8.04 0.5 0.115 14.3，12.4 0.7 8.31，8.03
Table 3. Structural parameters of 270° deflection system composed of 70°+130°+70° magnets
View tableView in ArticleTable 3. Structural parameters of 270° deflection system composed of 70°+130°+70° magnets
magnet angle/(°) radius/m injection angle/(°) exit angle/(°) gap/m drift /m focus distance/m 70，130，70 0.2 0，8，−4.3 −4.3，8，0 0.04 0.1924 2
Table 4. Structural parameters of three 270° deflection systems and beam parameters at 1.5 m
View tableView in ArticleTable 4. Structural parameters of three 270° deflection systems and beam parameters at 1.5 m
type magnet angle/(°) radius/ m injection angle/(°) exit angle/ (°) gap/ m drift / m focus length/m σx,σy/ (mm, mm) vertical height/cm two magnets 165.4，104.6 0.5 5.73，−59.6 59.6，−14.3 0.03 0.115 short 14.3，12.4 98.4 three magnets 90，90，90 0.2 10.2，10.2，10.2 10.2，10.2，10.2 0.07 0.28 long 8.72，8.07 68 70°+130°+70° magnets 70，130，70 0.2 0，8，−4.3 −4.3，8，0 0.04 0.1924 medium 3.6，4.75 58
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Jia Li, Quantang Zhao, Zhaohui Ran, Yuanming Long, Yang Zong, Yulun Li, Shuchun Cao, Xiaokang Shen, Zimin Zhang, Ping Yuan. Design and beam dynamic analysis of 270° achromatic deflection magnet system[J]. High Power Laser and Particle Beams, 2022, 34(12): 124002
Paper Information
Category: Particle Beams and Accelerator Technology
Received: Jun. 2, 2022
Accepted: Aug. 12, 2022
Published Online: Nov. 10, 2022
The Author Email: Zhao Quantang (zhaoquantang@impcas.ac.cn)
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