Multichannel down-scattered neutron detector for areal density measurement

¹ Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
² Lawerence Livermore National Laboratory, Livermore, California 94550, USA
³ Kumamoto University, 2-40-1 Kurokami, Kumamoto 860-8555, Japan
⁴ Tokuyama Corporation, 3–2-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8983, Japan
⁵ Tohoku University, 2–1–1 Katahira, Aoyou, Sendai, Miyagi 980–8577, Japan
⁶ Furukawa Co., Ltd., 1–25–13, Kannondai, Tsukuba, Ibaraki 305-0856, Japan
⁷ Hamamatsu Photonics k.k., 1820, Kurematsu, Nishi-ku, Hamamatsu-City 431-1202, Japan

Published online: 15 November 2013

Abstract

A down-scattered neutron detector operating in the multichannel counting mode was developed for areal density (ρR) measurement. Equipped with a newly developed ⁶Li glass scintillator (APLF80), the detector was tested in a fusion experiment at the GEKKO XII facility, Osaka University, Osaka, Japan. For a low-ρR fusion shot, the detector clearly discriminated the γ-rays, primary neutrons, γ-rays produced via (n, γ) reactions from the target chamber, and neutrons scattered by the target chamber. Furthermore, the observed signal was in good agreement with predictions made by Monte Carlo simulation.