TY - JOUR
T1 - Radiation field characterization with emphasis on the collimator configuration at the compact neutron source RANS-II facility
AU - Sugihara, Kenta
AU - Ikeda, Yujiro
AU - Kobayashi, Tomohiro
AU - Fujita, Kunihiro
AU - Ikeda, Shota
AU - Shigyo, Nobuhiro
AU - Otake, Yoshie
N1 - Funding Information:
This work was partially supported by Council for Science, Technology, and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), “Infrastructure maintenance, renovation and management” (Funding agency: JST) and also partially supported by “Upgrading and sophistication of compact and high brightness neutron system for high-degree application of industrial use” Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sport, Science, and Technology, Japan.
Funding Information:
This work was supported by RIKEN Junior Research Associate Program.
Publisher Copyright:
© 2022 Atomic Energy Society of Japan. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The RIKEN Accelerator-driven compact Neutron Source-II (RANS-II) based on the 7Li(p,n)7Be reaction with 2.49 MeV proton injection was installed in a small area of the experimental hall, where the scattered radiation is expected to strongly influence experiments. Therefore, we have begun to study the radiation characteristics of the RANS-II hall by simulation with the Particle and Heavy Ion Transport code System (PHITS) and by experiments to clearly identify the scattered component. In addition, to suppress the background, a collimator is studied with respect to its size, shape, and materials. With the use of the (Formula presented.) 30 mm borated polyethylene collimator, we found that the background becomes less than 1 (Formula presented.) of the extracted neutron beam intensity 1.0 m from the Li target. For the experiment, neutron suppression was characterized by measuring the neutron dose rate with a neutron dosimeter and a collimator. The suppression ability of the neutron beam was confirmed by comparing the results of simulations with those of experiments.
AB - The RIKEN Accelerator-driven compact Neutron Source-II (RANS-II) based on the 7Li(p,n)7Be reaction with 2.49 MeV proton injection was installed in a small area of the experimental hall, where the scattered radiation is expected to strongly influence experiments. Therefore, we have begun to study the radiation characteristics of the RANS-II hall by simulation with the Particle and Heavy Ion Transport code System (PHITS) and by experiments to clearly identify the scattered component. In addition, to suppress the background, a collimator is studied with respect to its size, shape, and materials. With the use of the (Formula presented.) 30 mm borated polyethylene collimator, we found that the background becomes less than 1 (Formula presented.) of the extracted neutron beam intensity 1.0 m from the Li target. For the experiment, neutron suppression was characterized by measuring the neutron dose rate with a neutron dosimeter and a collimator. The suppression ability of the neutron beam was confirmed by comparing the results of simulations with those of experiments.
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U2 - 10.1080/00223131.2022.2088632
DO - 10.1080/00223131.2022.2088632
M3 - Article
AN - SCOPUS:85133684068
SN - 0022-3131
VL - 60
SP - 110
EP - 123
JO - journal of nuclear science and technology
JF - journal of nuclear science and technology
IS - 2
ER -