title: Evaluation of two-stage system for neutron measurement aiming at increase in count rate at Japan Atomic Energy Agency-Fusion Neutronics Source.
abstract: In order to increase the count rate capability of a neutron detection system as a whole, we propose a multi-stage neutron detection system. Experiments to test the effectiveness of this concept were carried out on Fusion Neutronics Source. Comparing four configurations of alignment, it was found that the influence of an anterior stage on a posterior stage was negligible for the pulse height distribution. The two-stage system using 25 mm thickness scintillator was about 1.65 times the count rate capability of a single detector system for d-D neutrons and was about 1.8 times the count rate capability for d-T neutrons. The results suggested that the concept of a multi-stage detection system will work in practice.
authors.affiliation: Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Shinohara
authors.affiliation: Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ishii
authors.affiliation: Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ochiai
authors.affiliation: Cyclotron and Radioisotope Center, Tohoku University, Sendai, Miyagi 980-8578, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Baba
authors.affiliation: Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Sukegawa
authors.affiliation: Organization for Research Initiatives and Development, Doshisha University, Kyoto 602-8580, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sasao
authors.affiliation: Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Kitajima