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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials
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Sensors and Materials, Volume 32, Number 4(2) (2020)
Copyright(C) MYU K.K.
pp. 1489-1495
S&M2196 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2020.2748
Published: April 20, 2020

Development of Optical-fiber-based Neutron Detector Using Li-glass Scintillator for an Intense Neutron Field [PDF]

Akihisa Ishikawa, Atsushi Yamazaki, Kenichi Watanabe, Sachiko Yoshihashi, Akira Uritani, Yoshinori Sakurai, Hiroki Tanaka, Ryo Ogawara, Mitsuru Suda, and Tsuyoshi Hamano

(Received December 19, 2019; Accepted March 19, 2020)

Keywords: optical-fiber-based neutron detector, real-time measurement, Li-glass, Eu:LiCaAlF6, LiF/Eu:CaF2

The development of a neutron detector for real-time measurements in an intense neutron field is desired. We are developing a quartz optical-fiber-based neutron detector as a real-time neutron monitor. Thus far, Eu:LiCaAlF6 crystals and LiF/Eu:CaF2 eutectics were used as the scintillators of the quartz optical-fiber-based neutron detectors. These scintillators have high light yields, but relatively long decay time constants, which are limitation factors of the dynamic range of optical-fiber-based neutron detectors. In this paper, we applied a small Li-glass scintillator to a quartz optical-fiber-based neutron detector using an optical fiber with high numerical aperture (NA) and a UV-curable resin with high transmittance. The fabricated detector showed a clear peak corresponding to neutron events in the pulse height distribution. The radiation resistance was evaluated and no deterioration was observed up to 2×1012 n/cm2. The detector output linearity was confirmed up to 450 kcps, which was about ten times larger than that of the detector using the conventional Eu:LiCaAlF6 or LiF/Eu:CaF2 scintillator.

Corresponding author: Akihisa Ishikawa


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Cite this article
Akihisa Ishikawa, Atsushi Yamazaki, Kenichi Watanabe, Sachiko Yoshihashi, Akira Uritani, Yoshinori Sakurai, Hiroki Tanaka, Ryo Ogawara, Mitsuru Suda, and Tsuyoshi Hamano, Development of Optical-fiber-based Neutron Detector Using Li-glass Scintillator for an Intense Neutron Field, Sens. Mater., Vol. 32, No. 4, 2020, p. 1489-1495.



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