Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Evaluation by thickness of a linear accelerator target at 6-20 MeV electron beam in MCNP6

  • Dong-Hee Han (Department of Medical Health Science, Kangwon National University) ;
  • Kyung-Hwan Jung (Department of Medical Health Science, Kangwon National University) ;
  • Jang-Oh Kim (Department of Radiological Science, Kangwon National University) ;
  • Da-Eun Kwon (Department of Medical Health Science, Kangwon National University) ;
  • Ki-Yoon Lee (Department of Radiological Science, Kangwon National University) ;
  • Chang-Ho Lee (Department of Emergency and Disaster Management, Inje University)
  • Received : 2022.11.02
  • Accepted : 2023.02.17
  • Published : 2023.06.25
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Abstract

This study quantitatively evaluated the source term of a linear accelerator according to target thickness for a 6-20 MeV electron beam using MCNP6. The elements of the target were tungsten and copper, and a composite target and single target were simulated by setting different thickness parameters depending on energy. The accumulation of energy generated through interaction with the collided target was evaluated at 0.1-mm intervals, and F6 tally was used. The results indicated that less than 3% reference error was maintained according to the MCNP recommendations. At 6, 8, 10, 15, 18, and 20 MeV, the energy accumulation peaks identified for each target were 0.3 mm in tungsten, 1.3 mm in copper, 1.5 mm in copper, 0.5 mm in tungsten, 0.5 mm in tungsten, and 0.5 mm in tungsten. For 8 and 10 MeV in a single target consisting only of copper, the movement of electrons was confirmed at the end of the target, and the proportion of escaped electrons was 0.00011% and 0.00181%, respectively.

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