Design and beam dynamic analysis of 270° achromatic deflection magnet system

Li Jia; Zhao Quantang; Ran Zhaohui; Long Yuanming; Zong Yang; Li Yulun; Cao Shuchun; Shen Xiaokang; Zhang Zimin; Yuan Ping

doi:10.11884/HPLPB202234.220180

Volume 34 Issue 12

Nov. 2022

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Article Navigation > High Power Laser and Particle Beams > 2022 > 34(12): 124002

Li Jia, Zhao Quantang, Ran Zhaohui, et al. Design and beam dynamic analysis of 270° achromatic deflection magnet system[J]. High Power Laser and Particle Beams, 2022, 34: 124002. doi: 10.11884/HPLPB202234.220180

Citation:

Li Jia, Zhao Quantang, Ran Zhaohui, et al. Design and beam dynamic analysis of 270° achromatic deflection magnet system[J]. High Power Laser and Particle Beams, 2022, 34: 124002. doi: 10.11884/HPLPB202234.220180

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Design and beam dynamic analysis of 270° achromatic deflection magnet system

doi: 10.11884/HPLPB202234.220180

Li Jia^{1, 2
,},
Zhao Quantang^{1, 2
,
,},
Ran Zhaohui¹,
Long Yuanming¹,
Zong Yang¹,
Li Yulun^{1, 2},
Cao Shuchun^{1, 2},
Shen Xiaokang^{1, 2},
Zhang Zimin^{1, 2},
Yuan Ping^{1, 2}

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2.
College of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2022-06-02
Accepted Date: 2022-08-12
Rev Recd Date: 2022-07-20

Available Online: 2022-11-02

Publish Date: 2022-11-02

Abstract

Abstract

The 270° beam deflection system with magnets is widely used in medical electron linear accelerators and high-energy electron industrial irradiation accelerators. In this paper, three common structures of 270° deflection magnet are systematically analyzed and discussed. Numerical calculation and simulation methods are used for the two-magnet asymmetric deflection structure, the three 90° magnets deflection structure and the 70°+130°+70° deflection structure. The achromatic transmission conditions of the deflection systems are given, and the changes of beam envelope in the deflection and exit beam line are analyzed. After analysis and comparison, the advantages and disadvantages of the three structures are listed in detail, which has certain guiding significance for the selection of structures in specific application fields. The two-magnet asymmetric deflection structure is suitable for medical accelerators. The three 90° magnets deflection structure is suitable for irradiation accelerators that require long-distance drift at the exit. The 70°+130°+70° deflection structure can satisfy the non-destructive drift of a certain distance from the exit, and it achieves relatively low cost, therefore, it which is a more economical and suitable choice for industrial irradiation accelerators.
- industrial irradiation electron accelerator,
- 270° magnet deflection system,
- beam dynamics optimization,
- achromatic transmission,
- beam deflection system

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References(19)

References

[1]	李金海. 射频电子辐照加速器原理与关键技术[M]. 上海: 上海交通大学出版社, 2020 Li Jinhai. Principles and key technologies of radio frequency accelerators for electron irradiation[M]. Shanghai: Shanghai Jiao Tong University Press, 2020
[2]	Cleland M R. Industrial applications of electron accelerators[R]. Zeegse, The Netherlands: CERN Accelerator School, 2006: 383-416.
[3]	Amano Y. Atoms in industry: radiation technology supports development[N/OL]. Vienna: IAEA Bulletin, 2015. https://www.iaea.org/publications/magazines/bulletin/56-3.
[4]	Hamm R W. Review of industrial accelerators and their applications[R]. AP/IA-12, 2009.
[5]	Shahzad A A, Patil B J, Pethe S N, et al. Design of electron beam bending magnet system for electron and photon therapy: a simulation approach[J]. Indian Journal of Pure & Applied Physics, 2019, 57(7): 492-497.
[6]	Akhter S, Bhoraskar V N, Dhole S D. 270° electron beam bending system using two sector magnets for therapy application[C]//Proceeding of IBIC 2012. 2012: 50-53.
[7]	杨绍洲, 杨光, 沈庆贤, 等. 医用电子直线加速器的射束偏转系统[J]. 中国医学物理学杂志, 2000, 17(3):129-131,133 doi: 10.3969/j.issn.1005-202X.2000.03.001 Yang Shaozhou, Yang Guang, Shen Qinxian, et al. The beam bend magnet system of medical electron accelerator[J]. Chinese Journal of medical Physics, 2000, 17(3): 129-131,133 doi: 10.3969/j.issn.1005-202X.2000.03.001
[8]	刘迺泉. 270°消色差偏转磁铁束流传输特性[J]. 核科学与工程, 1983, 3(1):79-89 Liu Naiquan. Beam transport characteristics of the 270° doubly achromatic bending magnet[J]. Chinese Journal of Nuclear Science and Engineering, 1983, 3(1): 79-89
[9]	陈万忠, 纪东泽, 成希革. 270°束流偏转系统研制[J]. 医学装备, 2009, 22(8):46-48 Chen Wanzhong, Ji Dongze, Cheng Xige. Development of 270° beam deflection system[J]. Medical Equipment, 2009, 22(8): 46-48
[10]	李泉凤, 孔巢城, 郭冰琪, 等. 束流在270°偏转磁铁系统输运过程中的损失计算[J]. 高能物理与核物理, 2007, 31(8):787-791 doi: 10.3321/j.issn:0254-3052.2007.08.018 Li Quanfeng, Kong Chaocheng, Guo Bingqi, et al. Calculation of the beam loss in the 270° bending magnet system of the medical accelerator[J]. High Energy Physics and Nuclear Physics, 2007, 31(8): 787-791 doi: 10.3321/j.issn:0254-3052.2007.08.018
[11]	Chemerisov S D, Gromov R, Bailey J L, et al. Beamline design and beam diagnostic for Mo-99 production facility utilizing high power electron accelerators[R]. Argonne: Argonne National Lab, 2019.
[12]	Shahzad A, Phatangare A B, Bharud V D, et al. Design and development of the 6-18 MeV electron beam system for medical and other applications[J]. Radiation Effects and Defects in Solids, 2017, 172(11/12): 931-951.
[13]	Brown K L, Turnbull W G. Achromatic magnetic beam deflection system: 3867635[P]. 1975-02-18.
[14]	Hutcheon R M, Heighway E A. A new compact doubly achromatic asymmetric two-magnet beam deflection system[J]. Nuclear Instruments and Methods in Physics Research, 1981, 187(1): 81-87. doi: 10.1016/0029-554X(81)90473-0
[15]	Jongen Y, Abs M, Zaremba S, et al. Realignment of a diverging electron beam: a new beam delivery system for Rhodotrons[C]//Proceedings of 1997 Particle Accelerator Conference. Vancouver: IEEE, 1997: 3857-3859.
[16]	李泉凤, 邹昀. 双消色散270°偏转磁铁的物理设计[J]. 原子能科学技术, 1995, 29(5):423-427 Li Quanfeng, Zhou Yun. Physical design of a 270° double achromatic bending magnet[J]. Atomic Energy Science and Technology, 1995, 29(5): 423-427
[17]	Michael B. User’s Manual for elegant[EB/OL]. Michael Borland: Advanced Photon Source, 2016. https://www3.aps.anl.gov/forums/elegant/.
[18]	M B, Makino K. COSY INFINITY 9.1 programmer’s manual[EB/OL]. East Lansing: Michigan State University, 2011. http://cosyinfinity.org.
[19]	魏开煜. 带电束流传输理论[M]. 北京: 科学出版社, 1986 Wei Kaiyu. Charged beam transport theory[M]. Beijing: Science Press, 1986