Radiation-resistant optical fiber/scintillator system for gamma-ray monitor

Toh, K.; Nakamura, Tatsuya; Yamagishi, H.; Sakasai, K.; Soyama, Kazuhiko; Shikama, Tatsuo

doi:10.1016/j.nima.2012.10.039

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…(16,17) Since the optical window is from 700 to 1200 nm for the human body, NIR-emitting scintillators can be used for radiation-based bioimaging applications. (18) Furthermore, scintillators emitting NIR photons are expected to be effective tools for radiation dose monitoring in high-dose environments. In general, highdose environments such as a nuclear reactor generate Cherenkov radiation, which has very high intensity and is observed in the UV-blue range.…”

Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Akatsuka¹,

Nakauchi²,

Kato³

et al. 2020

Sensors and Materials

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Scintillators emitting near-infrared (NIR) photons have unique characteristics and have been attracting attention recently. For example, scintillators emitting NIR photons are expected to be effective tools for radiation dose monitoring in high-dose environments. In this study, YAlO 3 samples doped with various rare-earth ions (Er 3+ , Ho 3+ , Pr 3+ , and Tm 3+ ) were synthesized by the floating zone method and their scintillation properties from the UV to NIR range were evaluated. Regarding their scintillation detection property, the Er 3+ -doped sample indicated an approximately linear proportional relationship from 1 mGy to 10 Gy.

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Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Akatsuka¹,

Nakauchi²,

Kato³

et al. 2020

Sensors and Materials

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“…NIR photons (700-1500 nm) have a high penetration power into the human body without causing damage, (14)(15)(16) and scintillators emitting NIR photons are promising for use in radiation-based bioimaging applications. (17) Moreover, scintillators emitting NIR photons are considered to work effectively in a high-dose environment. In general, the combination of a scintillator and optical fiber has been used for monitoring high radiation doses.…”

Section: Introductionmentioning

confidence: 99%

“…However, optical fibers are damaged by high radiation doses, resulting in strong absorption of UV and visible photons. (17) Moreover, Cherenkov radiation appears in the UV-blue range in a high-dose environment such as a nuclear reactor. (18,19) If scintillator materials emitting UV-blue light are used in the above situation, the Cherenkov radiation will overlap with scintillation signals, leading to incorrect radiation measurements.…”

Section: Introductionmentioning

confidence: 99%

X-ray-induced Luminescence Properties of Nd-doped GdVO4

Akatsuka¹,

Kimura²,

Onoda³

et al. 2021

Sensors and Materials

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Nd-doped GdVO 4 single crystals were synthesized and their photoluminescence and scintillation properties were evaluated. The Nd-doped samples showed scintillation due to the 4f-4f transitions of Nd 3+ with peaks at around 900, 1060, and 1320 nm. In addition, we evaluated the relationship between the scintillation signal intensity and the X-ray exposure dose rate for dosimetric application. All the Nd-doped samples demonstrated high sensitivity with a dynamic range from 0.006 to 60 Gy/h.

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“…Radiation induced attenuation in optical fiber [6,7]. These excess optical losses are due to the generation of point defects in the pure or doped silica glass constituting the light propagating medium [8][9][10]. Radiation damage of material due to incident photon flux is varied, depending upon the material through which the photon propagate and the photon energy of the radiation [11].…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurements of Attenuation and Recovery within Single Mode Optical Fiber Cables under the Effects of Gamma Radiation

Imbaby¹,

Zaghloul²,

M³

et al. 2021

Int J Opt Photonic Eng

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Efficient transmission of data within optical fiber cables within radiation environments is a challenge. It leads to severe attenuations in the optical fiber cables. This issue is addressed in this manuscript. Experimental measurements are conducted in order to overcome the radiation influence on single mode optical fiber cables. Two experiments are implemented. The first one depends on 5 m single mode patch cords fiber cable. This cable is subjected to gamma radiation at different radiation doses of 5 kGy, 10 kGy, 15 kGy and 20 kGy with dose rate of 1.296 KGy/ hr. These doses are the maximum doses that the cable of fiber is exposed in normal conditions in our radiation environment. The second experiment uses 3 m single mode fiber cable with different jackets. In this experiment, the cable is degraded by gamma radiation of doses 5 kGy, 10 kGy, 15 kGy and 25 kGy and dose rate of 2.273 KGy/hr. The fiber cables are degraded through gamma 1 radiation facility within Egypt Mega gamma1 in National Center for Radiation Research and Technology of Egyptian Atomic Energy Authority (EAEA). Then, the attenuation of these cables is measured in two different places in National Institute for Laser Science in Cairo University and Africa Teleco private company. The measurements are done using laser sources at spectral wavelengths of 1310 nm and 1550 nm. Hence, various readings of attenuations in dB are demonstrated. Attenuation recovery is of primary concern. It is executed within 36 days. The experimental results confirm the superiority of operation at 1550 nm over that of 1310 nm. The experimental measurements are performed before and after radiation degradation for comparison purposes. The recovered attenuation achieves better results comparable to results before degradations.

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Radiation-resistant optical fiber/scintillator system for gamma-ray monitor

Cited by 13 publications

References 12 publications

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

X-ray-induced Luminescence Properties of Nd-doped GdVO4

Experimental Measurements of Attenuation and Recovery within Single Mode Optical Fiber Cables under the Effects of Gamma Radiation

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