title: Development of beryllium-based neutron target system with three-layer structure for accelerator-based neutron source for boron neutron capture therapy.
abstract: The iBNCT project team with University of Tsukuba is developing an accelerator-based neutron source. Regarding neutron target material, our project has applied beryllium. To deal with large heat load and blistering of the target system, we developed a three-layer structure for the target system that includes a blistering mitigation material between the beryllium used as the neutron generator and the copper heat sink. The three materials were bonded through diffusion bonding using a hot isostatic pressing method. Based on several verifications, our project chose palladium as the intermediate layer. A prototype of the neutron target system was produced. We will verify that sufficient neutrons for BNCT treatment are generated by the device in the near future.
authors.affiliation: Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan. Electronic address: kumada@pmrc.tsukuba.ac.jp.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kumada
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kurihara
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Yoshioka
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsumoto
authors.affiliation: Mitsubishi Heavy Industry Ltd., Mihara, Hiroshima 729-0393, Japan.
authors.forename: Tomei
authors.initials: T
authors.lastname: Sugano
authors.affiliation: Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Sakurai
authors.affiliation: Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Takeji
authors.initials: T
authors.lastname: Sakae
authors.affiliation: Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Matsumura
mesh_terms: D001608:Beryllium / Q000737:chemistry*; D016754:Boron Neutron Capture Therapy; D009502:Neutrons
chemical_list: D001608:Beryllium
keywords: Accelerator-based neutron source; Beryllium; Blistering; Boron neutron capture therapy; Hot isostatic pressing; Hydrogen storing material; Target material