検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

First demonstration of a novel single-end readout type position-sensitive optical fiber radiation sensor based on wavelength-resolved photon counting

光子波長分解計数計測に基づく新方式片側読み出し・位置検出型光ファイバ放射線センサの初実証

寺阪 祐太   ; 渡辺 賢一*; 瓜谷 章*

Terasaka, Yuta; Watanabe, Kenichi*; Uritani, Akira*

In this study, a single-end readout type position-sensitive optical fiber radiation sensor was developed. Using the wavelength dependency of light attenuation inside the optical fiber, the incident position of radiation at the fiber can be estimated reversely. Instead of a spectrometer, we employed bandpass filters and photon-counting head as a photodetector to improve detection efficiency. The detection efficiency of a 10 m long plastic scintillation fiber at the 5 m position from the readout end was evaluated to be in the range of 0.08-0.12 % for 662 keV gamma-rays from $$^{137}$$Cs and 2.6-3.9 % for beta-rays from $$^{90}$$Sr/$$^{90}$$Y when a bandpass filter transmitting photons with a wavelength of 500 nm was used. A basic measurement test of radiation intensity distribution was conducted using a $$^{90}$$Sr/$$^{90}$$Y radioactive point source. A field test was also performed at the difficult-to-return zone in Fukushima Prefecture, and the estimated dose rate distribution roughly agreed with the survey meter measurement.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.