WEP124  加速器応用・産業利用  8月2日 第1,2,3,4会議室他 13:00 - 15:00
Conceptual design of compact-multichannel neutron moderator for accelerator-based BNCT system
○KOAY HUI WEN,土岐 博,福田 光宏,嶋 達志,関 良一,原 周平(大阪大学核物理研究センター),小泉 正彦,高階 正彰,森本 奈美(大阪大学大学院医学系研究科)
○Hui Wen Koay, Hiroshi Toki, Mitsuhiro Fukuda, Tatsushi Shima, Ryoichi Seki, Shuhei Hara (RCNP), Masahiko Koizumi, Masaaki Takashina, Nami Morimoto (Graduate School of Medicine, Osaka University)
This study aims to develop a compact-multichannel neutron moderator to provide a high flux epithermal neutron beam source using an accelerator to support the new cancer treatment Boron Neutron Captured Therapy (BNCT). Typical accelerator-based BNCT neutron generators are delivering only a certain type of neutron spectrum through only one channel. However, in this study, new design of accelerator-based moderator system is proposed to deliver neutron beams at several different channels, while maintaining the minimum epithermal neutron flux as suggested by IAEA. Several different materials were chosen and investigated in detailed. Out of the materials studied, Fe, AlF3 and Teflon were chosen to be the final options for the configuration of moderators. Besides moderators, other aspects including the target, gamma shield, collimator as well as the thermal analysis of the target system were also performed to complete the study. A preliminary stage of experiment of this study was also performed to confirm the feasibility of the conceptual-design of this system in clinical accelerator-based BNCT.