Evaluation of the Detection Efficiency of LYSO Scintillator in the Fiber-Optic Radiation Sensor

Abstract

The aim of this study was to develop and evaluate fiber-optic sensors for the remote detection of gamma rays in areas that are difficult to access, such as a spent fuel pool. The fiber-optic sensor consists of a light-generating probe, such as scintillators for radiation detection, plastic optical fibers, and light-measuring devices, such as PMT. The (Lu,Y) 2 SiO 5 :Ce(LYSO:Ce) scintillator was chosen as the light-generating probe. The (Lu,Y) 2 SiO 5 :Ce(LYSO:Ce) scintillator has higher scintillation efficiency than the others and transmits light well through an optical fiber because its refraction index is similar to the refractive index of the optical fiber. The fiber-optic radiation sensor using the (Lu,Y) 2 SiO 5 :Ce(LYSO:Ce) scintillator was evaluated in terms of the detection efficiency and reproducibility for examining its applicability as a radiation sensor. Method Material Selection and Characteristic Study of Optic Fibersand Scintillators. The fiber-optic radiation sensor consisted of a radiation sensing probe, transmitting optical fiber, and data acquisition instruments. The fiber-optic radiation sensor should have a long transmitting optical fiber because it needs

A Review of Inorganic Scintillation Crystals for Extreme Environments

“…In addition, a 40-ns decay time showed that the light yield of the LYSO was approximately four times higher than that of the BGO. Therefore, (Lu,Y) 2 SiO 5 :Ce(LYSO:Ce) has an advantage for the remote detection of gamma rays because of its high light output, high density, fast decay time with good radiation hardness, non-hygroscopic with high effective atomic numbers, and stable physical and chemical properties [107].…”

Design and Characterisation of an Optical Fibre Dosimeter Based on Silica Optical Fibre and Scintillation Crystal

“…Compared with the fibre optic dosimeters presented so far, the SPC detector configurations of the presented dosimeter are approximately five-times less sensitive. On the contrary, using PMT, the sensitivity of the presented dosimeter is comparably sensitive or more sensitive [ 19 , 20 ]. Thus, the differences in sensitivity are mainly due to the sensitivity of different detectors and the different optical fibre properties, diameters, and NAs.…”

“…Nevertheless, in the fibre optic dosimeters published so far, the use of plastic optical fibres predominates [ 17 ]. Plastic fibres with larger diameters, typically 1–3 mm, are often used due to higher NAs, and they are not as fragile as silica optical fibres [ 18 , 19 ]. A common feature of these dosimeters is the adaptation of the diameter of the scintillation material to the diameter of the optical fibre [ 20 , 21 ], the deposition of scintillation material on the surface or inside the optical fibre [ 22 ], or the direct doping of the optical fibre with scintillation material [ 23 , 24 ].…”

On-Wafer Electron Beam Detectors by Floating-Gate FinFET Technologies

“…Nevertheless, to obtain the signals from these arrays, all the above requires complex peripheral circuits and timing control, which cannot be easily integrated directly on a Si wafer. In addition, both sensing arrays can only sense e-Beam dosage in a real-time fashion which requires power connection or/or battery unit in the sensor modules [29], [30], making their installation onto e-Beam systems more complex and less flexible. In addition, under the e-Beam sensing, with the high optical resolution and high energy e-Beam is found to penetrate deep into the sensing plan, result in serious disturbance on the sensing devices, leading to unexpected damage and/or distortion of the signals.…”