Degradation prediction of a γ-ray radiation dosimeter using InGaP solar cells in a primary containment vessel of the Fukushima Daiichi Nuclear Power Station

Okuno, Yasuki; Yamaguchi, Masafumi; Okubo, Nariaki; Imaizumi, Mitsuru

doi:10.1080/00223131.2019.1691072

Cited by 7 publications

(6 citation statements)

References 22 publications

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“…Therefore, we have proposed a radiation measurement system based on dosimetry technology using a solar cell. [2][3][4] Solar cells have structures similar to those of semiconductor radiation detectors. Conventional semiconductor radiation detectors have relatively thick structures because the absorption coefficient of radiation is much smaller than that of sunlight in semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Effects of He ion and electron beam irradiation on a CdTe solar cell dosimeter in a substrate configuration

Okamoto

Furumaki

Sato

et al. 2023

Jpn. J. Appl. Phys.

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In this work, the effects of He ion and electron beam irradiations to the substrate-type CdTe solar cells, which was suitable for the detection of alpha and beta radiation, were investigated. He ion irradiation revealed that the induced current proportionally increased with the increase of He ion current and that it was possible to detect alpha radiation using the substrate-type CdTe solar cell dosimeter. Next, the electron irradiation effects were investigated. The induced current proportional to the electron flux was also observed, and the sensitivity depended on the electron energy. In addition, the degradation of substrate-type CdTe solar cell dosimeter by electron beam irradiation was investigated. No significant degradation in short-circuit current was observed by the electron irradiation of 3×1016 cm-2 at 200 keV and 1×1016 cm-2 at 400 keV. This result suggests that the substrate-type CdTe solar cell dosimeter is sufficiently resistant to electron irradiation.

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Section: Introductionmentioning

confidence: 99%

Effects of He ion and electron beam irradiation on a CdTe solar cell dosimeter in a substrate configuration

Okamoto

Furumaki

Sato

et al. 2023

Jpn. J. Appl. Phys.

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“…The measurement system is also simple: it only requires an ammeter, without any complex analysis equipment. However, the long-term operation of such semiconductor-solar-cell-based detectors is compromised by damage due to the measured radiation, which causes degradation as well as detection inaccuracies . In high-flux-neutron detection, the radiation damage is predicted to be caused by the neutrons and high-energy charged particles.…”

Section: Introductionmentioning

confidence: 99%

“…However, the long-term operation of such semiconductor-solar-cell-based detectors is compromised by damage due to the measured radiation, which causes degradation as well as detection inaccuracies. 20 In high-flux-neutron detection, the radiation damage is predicted to be caused by the neutrons and high-energy charged particles. Therefore, devices with high radiation resistance must be developed.…”

Section: ■ Introductionmentioning

confidence: 99%

Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Okuno

Matsui

Kobayashi

et al. 2022

ACS Appl. Electron. Mater.

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Neutrons are analyzed in various fields such as space exploration, neutron radiography, and medicine. When neutrons are employed, a neutron detector is required to control the exposure dose. However, issues such as detector radiation tolerance, response linearity, and γ-ray noise limit the development of effective neutron detectors. Metal halide perovskite based direct conversion radiation detectors exhibit attractive characteristics such as being solution-processable at low temperatures and possessing tunable band gaps, low trap density, high charge carrier mobility, high radiation tolerance, and fast responses. The perovskite device’s potential for high-flux neutron applications has not been greatly determined; however, only related research has been conducted thus far. Here, we demonstrate a hybrid organic–inorganic perovskite semiconductor based neutron detector that satisfies all high-flux neutron detection requirements. The perovskite device was designed to possess a structure similar to that of solar cells and could be driven solely by the built-in potential, without an applied voltage. Using this perovskite device, a neutron detector was designed to maximize the efficiency of the back side conversion configuration and minimize sensitivity variations. Experiments on irradiation with the spectrum neutrons and calculations of the reaction rates revealed a 25 meV neutron sensitivity of 6.0 × 10–17 A n–1 cm–2 and a detection limit of 106 n cm–2 s–1. Further, an optical response test showed that a dynamic detection range with 6–7 orders of magnitude was realized. The detection characteristics for high-flux neutrons indicated a stable operation with no degradation during neutron irradiation at a fluence of −1012 cm–2. Moreover, noise from γ-rays had an insignificant effect on the accuracy of the neutron flux measurements. These results highlight that the proposed neutron detector based on a perovskite solar cell is a suitable monitoring sensor for high-flux neutrons.

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“…We have proposed a radiation dosimeter using a solar cell. [2][3][4] Solar cell has a similar structure to a semiconductor radiation detector. The conventional semiconductor radiation detectors have relatively thick structures, because the absorption coefficient of radiation is much smaller than that of sunlight in semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray irradiation effects on CdTe solar cell dosimeter

Okamoto

Igari

Fukui

et al. 2021

Jpn. J. Appl. Phys.

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Compact and radiation-tolerant radiation dosimeter without bias voltage application using solar cells such as CdTe was proposed for severe radiation environment near a nuclear reactor pressure vessel. In this work, γ-ray tolerance and γ-ray detection characteristics of CdTe solar cells were investigated. It was found that the CdTe solar cell has sufficient tolerance against γ-ray exposure up to 3 MGy. It was demonstrated that γ-ray induced current density linearly increased with increasing γ-ray intensity in the range up to approximately 1.5 kGy h−1. This result indicates that high dose-rate radiation detection can be performed using solar cells without voltage application. In addition, γ-ray sensitivity was successfully improved by a stack of CdTe solar cells with parallel connections. Furthermore, γ rays can be detected with high responsivity and small noise even under a high flux neutron environment.

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Degradation prediction of a γ-ray radiation dosimeter using InGaP solar cells in a primary containment vessel of the Fukushima Daiichi Nuclear Power Station

Cited by 7 publications

References 22 publications

Effects of He ion and electron beam irradiation on a CdTe solar cell dosimeter in a substrate configuration

Effects of He ion and electron beam irradiation on a CdTe solar cell dosimeter in a substrate configuration

Hybrid Organic–Inorganic Perovskite Semiconductor-Based High-Flux Neutron Detector with BN Converter

Gamma-ray irradiation effects on CdTe solar cell dosimeter

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