Fiber-optic radiation sensors

1985 ◽  
Author(s):  
Peter B. Lyons
Keyword(s):  
Fiber Optic ◽  
Optic Radiation ◽  
Radiation Sensors

Fiber optic radiation sensors

1994 ◽  
Author(s):  
Harald Bueker ◽  
Friedrich W. Haesing
Keyword(s):  
Fiber Optic ◽  
Optic Radiation ◽  
Radiation Sensors

Measurement of thermal neutrons with fiber-optic radiation sensors using Cerenkov effect

2015 ◽  
pp. 137-140
Author(s):  
K.W. Jang ◽  
J.S. Kim ◽  
S.H. Shin ◽  
J.S. Jang ◽  
H. Jeon ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Thermal Neutrons ◽  
Optic Radiation ◽  
Radiation Sensors ◽  
Cerenkov Effect

Fiber optic radiation dosimetry for medical applications

1990 ◽  
Author(s):  
Harald Bueker ◽  
Friedrich W. Haesing ◽  
S. Nicolai ◽  
B. Wolters
Keyword(s):  
Radiation Dosimetry ◽  
Fiber Optic ◽  
Medical Applications ◽  
Optic Radiation

scholarly journals Measurement of Gamma-Rays Induced Luminescence Generated in a Sapphire Based Fiber-Optic Radiation Sensor

2016 ◽  
Vol 04 (08) ◽  
pp. 1503-1506 ◽  
Author(s):  
Young Beom Song ◽  
Kyoung Won Jang ◽  
Hye Jin Kim ◽  
Dong Eun Lee ◽  
Mingeon Kim ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Fiber Optic ◽  
Optic Radiation ◽  
Radiation Sensor

scholarly journals Gamma-ray Spectroscopy Using Inorganic Scintillator Coated with Reduced Graphene Oxide in Fiber-Optic Radiation Sensor

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 543
Author(s):  
Jin Ho Kim ◽  
Seunghyeon Kim ◽  
Siwon Song ◽  
Taeseob Lim ◽  
Jae Hyung Park ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gamma Ray ◽  
Fiber Optic ◽  
Energy Spectra ◽  
Optic Radiation ◽  
Radiation Sensor ◽  
Reduced Graphene ◽  
Gamma Ray Spectroscopy ◽  
Inorganic Scintillators

In this study, we developed a remote gamma-ray spectroscopy system based on a fiber-optic radiation sensor (FORS) that is composed of an inorganic scintillator coated with reduced graphene oxide (RGO) and a plastic optical fiber (POF). As a preliminary experiment, we measured the transmitted light intensities using RGO membranes of different thicknesses with different wavelengths of emitted light. To evaluate the FORS performance, we determined the optimal thickness of the RGO membrane and measured the amounts of scintillating light and gamma energy spectra using radioactive isotopes such as 60Co and 137Cs. The amounts of scintillating light from the RGO-coated inorganic scintillators increased, and the energy resolutions of the gamma-ray spectra were enhanced. In addition, the gamma-ray energy spectra were measured using different types of RGO-coated inorganic scintillators depending on the lengths of the POFs for remote gamma-ray spectroscopy. It was expected that inorganic scintillators coated with RGO in FORS can deliver improved performance, such as increments of scintillating light and energy resolution in gamma-ray spectroscopy, and they can be used to identify nuclides remotely in various nuclear facilities.

scholarly journals Characteristics of fiber-optic radiation sensor for passive scattering proton beams

2017 ◽  
Vol 12 (11) ◽  
pp. P11015-P11015 ◽  
Author(s):  
J. Son ◽  
M. Kim ◽  
J. Jeong ◽  
Y. Lim ◽  
S.B. Lee ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Optic Radiation ◽  
Proton Beams ◽  
Radiation Sensor ◽  
Passive Scattering

Measurement of Two-Dimensional Photon Beam Distributions Using a Fiber-Optic Radiation Sensor for Small Field Radiation Therapy

2008 ◽  
Vol 55 (5) ◽  
pp. 2632-2636 ◽  
Author(s):  
Bongsoo Lee ◽  
Kyoung Won Jang ◽  
Dong Hyun Cho ◽  
Wook Jae Yoo ◽  
Sang Hun Shin ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Fiber Optic ◽  
Photon Beam ◽  
Small Field ◽  
Two Dimensional ◽  
Optic Radiation ◽  
Radiation Sensor ◽  
Field Radiation

Measurements of Relative Depth Doses Using Fiber-Optic Radiation Sensor and EBT Film for Brachytherapy Dosimetry

2010 ◽  
Vol 57 (3) ◽  
pp. 1496-1501 ◽  
Author(s):  
Bongsoo Lee ◽  
Wook Jae Yoo ◽  
Kyoung Won Jang ◽  
Dong Hyun Cho ◽  
Jeong Ki Seo ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Relative Depth ◽  
Optic Radiation ◽  
Radiation Sensor

scholarly journals Distributed fiber optic radiation sensors

2021 ◽  
Vol 1 ◽  
pp. 15-16
Author(s):  
Aleksander Wosniok ◽  
Katerina Krebber
Keyword(s):  
Refractive Index ◽  
Real Time ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Radiation Monitoring ◽  
High Radiation ◽  
Fiber Core ◽  
Radiation Induced ◽  
Radiation Sensors

Abstract. The international research efforts focused on the development of radiation sensors based on optic fibers have their origins in the 1970s (Evans et al., 1978). Generally, the lightweight fiber optic sensors are immune to electromagnetic field interference and high voltages making them deployable in harsh environments at hard to reach areas where conventional sensors usually will not work at all. A further advantage of such radiation sensors is the possibility of remote and real-time monitoring (Huston et al., 2001). In this work, we present our results achieved in several research activities for development of fiber optic dosimeters. The findings show that both the measurement of the radiation-induced attenuation (RIA) along the entire sensing fiber and the accompanying change in the refractive index of the fiber core can be used for distributed radiation monitoring in the kGy and MGy range, respectively. Depending on the fiber type and material the RIA shows varying response to dose rates, environmental temperatures and the wavelength of the laser source used. Thereby, an operation with visible laser light provides most favorable performance in terms of high radiation sensitivity. Operating at these wavelengths, RIA monitoring could yield high-sensitivity dose measurement with sub-gray resolution and accuracy (Stajanca and Krebber, 2017b); however, conventional optical time-domain reflectometry (OTDR) systems for RIA measurements operating in the visible range suffer from low-spatial resolution, long measurement times and poor signal-to-noise (SNR) ratio. The limitations of the OTDR performance can be overcome by the incoherent optical frequency domain reflectometry (I-OFDR) developed by the Federal Institute of Materials Research and Testing (BAM, Liehr et al., 2009) with potential for dynamic real-time measurement. Over the years, several highly radiation sensitive fibers, such as perfluorinated polymer optical fibers (PF-POF, Stajanca and Krebber, 2017a), phosphorous-doped silica optical fibers (SOF, Paul et al., 2009), aluminium-doped SOF (Faustov et al., 2013) and erbium-doped SOF (Wosniok et al., 2016) have been identified and are commercially available. As mentioned before, the radiation-induced RIA increase is associated with an increase in the refractive index leading also to material compaction in the fiber core. The latter two effects can be used for measuring radiation distribution based on Brillouin scattering in the range of high radiation doses of several MGy (Phéron et al., 2012; Wosniok et al., 2016). When using fiber optic sensors for radiation monitoring, the existing post-irradiation annealing behavior of the optical fiber sensors must also be considered.

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