Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (2): 17 doi: 10.1007/s41365-016-0168-5

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Theoretical study of magnetic lens with parallel beam matched

Guo-Jun Yang 1,2 , Zhuo Zhang 1,2, Tao Wei 1,2, Yi-Ding Li 1,2, Xiao-Ding Zhang 1,2, Jin-Shui Shi1,2   

  1. 1 Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China
    2 Key Laboratory of Pulsed Power, Chinese Academy of Engineering Physics, Mianyang 621900, China
  • Contact: Guo-Jun Yang E-mail:baita00@aliyun.com
  • Supported by:

    This work was supported by National Natural Science Foundation of China (Nos. 11475157, 11405162, 11205144 and 11176001), CAEP Developing Foundation (No. 2014A0402016), CAEP President Foundation (No. 201402086), and CAEP Key Laboratory Foundation (No. PPL2013PZ09).

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Guo-Jun Yang, Zhuo Zhang, Tao Wei, Yi-Ding Li, Xiao-Ding Zhang, Jin-Shui Shi. Theoretical study of magnetic lens with parallel beam matched.Nuclear Science and Techniques, 2017, 28(2): 17     doi: 10.1007/s41365-016-0168-5

Abstract:

The magnetic lens (Zumbro lens) is a critical part in proton radiography. Traditionally the matched beam for Zumbro lens in proton radiography is a virtual point source beam, which is not suitable for some cases, such as cylindrical samples. In these cases, a parallel beam is more appropriate. In this paper, a method, which uses quadrupole beamline, is proposed for designing a magnetic lens with parallel beam matched. Theoretical analysis is given. The results show that the matched beam for this lens is indeed parallel beam, while the major merits of Zumbro lens are inherited. Following this method, a theoretical design based on the 11-MeV cyclotron is presented.

Key words: Proton radiography, Magnetic lens, Chromatic blur, Parallel beam, Match