TY - JOUR
T1 - Development of an MPPC-based gamma-ray detector onboard a radiation source imager under high-dose environments and initial performance results
AU - Mizuno, Tomoya
AU - Arimoto, Makoto
AU - Sato, Daichi
AU - Yoshiura, Kotaro
AU - Tomoda, Takahiro
AU - Ishiguro, Kairi
AU - Kataoka, Jun
AU - Sawano, Tatsuya
AU - Yonetoku, Daisuke
AU - Terazawa, Shinsuke
AU - Shiota, Satoshi
N1 - Funding Information:
We gratefully acknowledge financial support from JSPS, Japan KAKENHI Grant Numbers JP19H04483 , JP19K22924 , JST ERATO, Japan Grant Number JPMJER2102 , the Naito Foundation, Japan , the Uehara Memorial Foundation, Japan , the Casio Science Promotion Foundation, Japan , and the JSPS Leading Initiative for Excellent Young Researchers program, Japan .
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/11
Y1 - 2023/1/11
N2 - Since the accident at the Fukushima Daiichi Nuclear Power Plant ∼10 years ago, various studies have been conducted focusing on the decontamination of radioactive materials and the decommissioning of the remains of the reactor. It is crucial to identify the locations of radioactive materials for the decontamination of a building that is exposed to high radiation doses. One of the most widely used methods is the visualization of gamma rays with energy information using a photon-counting imager. However, the existing imagers have limited functionality, making it difficult to implement them in such an environment. Therefore, we have developed a novel pinhole gamma imager containing multi-pixel photon counters (MPPCs) combined with fast scintillators, which are processed using fast signal-processing analog and digital large integrated circuits under high-dose environments. The two-dimensional sensor array developed in this study can obtain incident gamma-ray photon energies with a counting rate of a few MHz/mm2. Furthermore, we were able to perform two-dimensional gamma-ray imaging of an extremely strong radiation source of 60Co with ∼45 TBq, by combining the sensor array with the dedicated tungsten collimator and housing.
AB - Since the accident at the Fukushima Daiichi Nuclear Power Plant ∼10 years ago, various studies have been conducted focusing on the decontamination of radioactive materials and the decommissioning of the remains of the reactor. It is crucial to identify the locations of radioactive materials for the decontamination of a building that is exposed to high radiation doses. One of the most widely used methods is the visualization of gamma rays with energy information using a photon-counting imager. However, the existing imagers have limited functionality, making it difficult to implement them in such an environment. Therefore, we have developed a novel pinhole gamma imager containing multi-pixel photon counters (MPPCs) combined with fast scintillators, which are processed using fast signal-processing analog and digital large integrated circuits under high-dose environments. The two-dimensional sensor array developed in this study can obtain incident gamma-ray photon energies with a counting rate of a few MHz/mm2. Furthermore, we were able to perform two-dimensional gamma-ray imaging of an extremely strong radiation source of 60Co with ∼45 TBq, by combining the sensor array with the dedicated tungsten collimator and housing.
KW - Gamma rays
KW - High dose
KW - MPPC
KW - Photon counting
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U2 - 10.1016/j.nima.2022.167544
DO - 10.1016/j.nima.2022.167544
M3 - Article
AN - SCOPUS:85141925114
SN - 0168-9002
VL - 1046
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 167544
ER -