[7p-PA8-1~80] 2 Ionizing Radiation（Poster）

[7p-PA8-3] Status of the recent development of neutron imager with capillary plate II

〇Ryutaro Ito¹, Satoshi Ishizawa¹, Fuyuki Tokanai¹, Haruyasu Kondo², Hiroyuki Sugiyama², Masahiro Hayashi², Teruyuki Okada², Takayuki Sumyoshi³, Seiji Tasaki⁴, Masanori Hirose⁵, Masahiro Hino⁶, Syunji Kishimoto⁷ (1.Yamagata Univ., 2.HPK.K., 3.Tokyo Metropolitan Univ., 4.Graduate School of Engineering, Kyoto Univ., 5.Graduate School of Science, Kyoto Univ., 6.Research Reactor Institute, Kyoto Univ., 7.KEK)

Keywords:MPGD, Capillary Plate

A glass capillary plate (CP) is a thin glass plate of 300 μm thickness with a large number of through holes (50 μm diameter with 58 μm pitch). The CP is one of a device for a hole-type micropattern gaseous detectors (MPGD) as represented by gas electron multiplier (GEM). We have successfully developed an optical imaging CP gas detector, which consists of a CP gas detector, a mirror, and a cooled CMOS camera system, for imaging of α-ray and X-ray photoelectron track. Owing to the high imaging capability of the optical imaging CP gas detector, we have been developing a neutron imager. The performance of the neutron imager was investigated using a thermal neutron beam at the Kyoto University Accelerator-driven Neutron Source (KUANS). The tracks of α-rays or ⁷Li produced by the interaction between neutrons and ¹⁰B were clearly observed. The characteristics have been also investigated by a computer simulation using the particle and heavy ion transport code system (PHITS). We report on the status of the development for the neutron imager with high imaging quality.