Evaluation by thickness of a linear accelerator target at 6-20 MeV electron beam in MCNP6

• Published in: Nuclear engineering and technology Vol. 55; no. 6; pp. 1994 - 1998
• Main Authors: Han, Dong-Hee, Jung, Kyung-Hwan, Kim, Jang-Oh, Kwon, Da-Eun, Lee, Ki-Yoon, Lee, Chang-Ho
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2023; Elsevier; 한국원자력학회
• Subjects: Evaluation; Linear accelerator; MCNP6; Source term; 원자력공학; Evaluation; MCNP6; Linear accelerator; Source term
• ISSN: 1738-5733; 2234-358X
• DOI: 10.1016/j.net.2023.02.026

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.