Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (1): 10202-010202.doi: 10.11889/j.0253-3219.2019.hjs.42.010202

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Use of radiochromic film for diagnosis of accelerator beam position

Yaqian CAI1,2,Qingxi YANG2,Kaizhong DING2,Yuntao SONG2,Yucheng WU3,Lingli MAO1   

  1. 1. University of Science and Technology of China, Hefei 230026, China
    2. Hefei institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
    3. Hefei CAS Ion Medical and Technical Devices Co, Ltd., Hefei 230088, China
  • Received:2018-07-20 Revised:2018-09-20 Online:2019-01-10 Published:2019-01-25
  • Supported by:
    Supported by Joint Design of China-Russia Superconducting Proton Accelerator (No.1604b0602005), Design of 200 MeV Advanced Superconducting Proton Accelerator (No.1503062029)

Abstract: Background

According to the beam characteristics and debugging requirements of SC200 superconducting proton cyclotron, it is necessary to measure the beam position accurately in the process of proton acceleration and extraction.


This study aims to propose a beam position diagnostic method by means of radiochromic film.


First of all optimal type of the film was selected by dose calculation at different measuring positions. The feasibility of four types of films was verified by Monte Carlo simulation calculation and experimental measure on ion source test platform. Then the optimal irradiation time for different types of films at different measurement positions was provided through the experiment and dose analysis. Finally, a processing scheme for visualizing the discoloration area of the film was proposed.[Result &


The four radiochromic films can be colored after proton irradiation, and the color of the films can be maintained stable after long time, hence can be used for beam position diagnostics.Key wordsCyclotron, Beam diagnostics, Radiochromic film, Absorbed dose, Fixing device