RADIATION PROTECTION ›› 2022, Vol. 42 ›› Issue (1): 71-78.

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Development and preliminary test of a novel plane-parallel ionization chamber

SUN Mingyan1,2, ZHANG Weihua1, TONG Teng1, LI Daowu1, ZHANG Yi1, HUANG Xianchao1, LV Ning2   

  1. 1. Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049;
    2. Rocket Force University of Engineering, Xi'an 710025
  • Received:2021-06-15 Online:2022-01-20 Published:2022-01-24

Abstract: A plane-parallel ionization chamber for position and dose detection of proton beam is developed. The ionization chamber structure is optimized by simulating the electric field distribution, equivalent water thickness, and lateral scattering of proton beams of different energies after passing through the ionization chamber using the FEM-based Ansys simulation software and Geant4 Monte Carlo toolkit. A YXLON 450 kV X-ray tube, 6 MeV pulse accelerator and Peking University tandem accelerator were used to conduct preliminary tests on the ionization chamber. The ionization chamber operated stably, and the information of 2-D distribution of rays and the collection of dose information were accurate and the performance was good.

Key words: beam 2-D distribution monitoring, plane-parallel ionization chamber, Genat4, finite element method, Monte Carlo simulation

CLC Number: 

  • TL811+.1