Simulation and Optimization of Optical Fiber Irradiation with X-rays at Different Energies

Meyer, Arnaud; Lambert, Damien; Morana, Adriana; Paillet, Philippe; Boukenter, Aziz; Girard, Sylvain

doi:10.3390/radiation3010006

Cited by 15 publications

(4 citation statements)

References 42 publications

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“…The external X-ray beam was delivered by the LABHX facility of Laboratoire Hubert Curien, operating at 100 kV and generating photons of ~40 keV average energy fluence [ 17 ]. The X-ray dose rate was driven by the electric current of the equipment.…”

Section: Methodsmentioning

confidence: 99%

Effects of Measurement Temperature on Radioluminescence Processes in Cerium-Activated Silica Glasses for Dosimetry Applications

Zghari

Hamzaoui

Capoen

et al. 2023

Sensors

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Cerium-doped-silica glasses are widely used as ionizing radiation sensing materials. However, their response needs to be characterized as a function of measurement temperature for application in various environments, such as in vivo dosimetry, space and particle accelerators. In this paper, the temperature effect on the radioluminescence (RL) response of Cerium-doped glassy rods was investigated in the 193–353 K range under different X-ray dose rates. The doped silica rods were prepared using the sol-gel technique and spliced into an optical fiber to guide the RL signal to a detector. Then, the experimental RL levels and kinetics measurements during and after irradiation were compared with their simulation counterparts. This simulation is based on a standard system of coupled non-linear differential equations to describe the processes of electron-hole pairs generation, trapping-detrapping and recombination in order to shed light on the temperature effect on the RL signal dynamics and intensity.

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Section: Methodsmentioning

confidence: 99%

Effects of Measurement Temperature on Radioluminescence Processes in Cerium-Activated Silica Glasses for Dosimetry Applications

Zghari

Hamzaoui

Capoen

et al. 2023

Sensors

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“…To investigate the capability of this OF to perform distributed RIA measurements inside the IdeFIX X-ray machine (100 kV, W target) of the Laboratoire Hubert Curien (Saint Etienne, France) [38], we employed 26 m of ULL-PSCF, divided in sections, as shown in Figure 2. The combination of 2 m exposed (EF) and 5 m shielded (SF) sections of the fiber resulted in a non-uniform exposition to the X-ray beam, which could then be exploited to investigate the capacity of the sensor to provide spatially resolved radiation detection.…”

Section: Methodsmentioning

confidence: 99%

Distributed Optical Fiber-Based Radiation Detection Using an Ultra-Low-Loss Optical Fiber

Weninger,

Morana,

Ouerdane

et al. 2024

Radiation

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The combination of an ultra-low-loss optical fiber sensitive to ionizing radiation and an optical time domain reflectometer (OTDR) is investigated to explore the feasibility of a single-ended distributed radiation detector. The peculiarity of the tested fiber resides in its regenerative high radiation-induced attenuation (RIA) response in the infrared spectrum (1310 nm), which returns to a low value once the irradiation has ended, combined to its sensitivity, highly increasing with the dose rate. In this work, only some sections of the fiber line were irradiated with 100 kV X-rays at room temperature, to prove the spatially resolved radiation detection capabilities of the system. The transient RIA response of the fiber was characterized at different pre-irradiation doses. A pre-irradiation treatment was shown to stabilize the optical fiber response, improving its RIA vs. dose rate linearity and repeatability. This improved response, in terms of radiation quantification, comes at the cost of a lower detection threshold. This work lays the bases for a distributed radiation detector, with some capabilities in dose rate evaluation.

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“…The two fibers under test (FUTs) were arranged in a monolayer spiral inside the LabHX X-ray machine at Lab. Hubert Curien in Saint-Etienne (France), that is equipped with an X-ray tube working at 100 kV, with a tungsten target, which results in an average photon energyfluence of 40 keV [30]. A thermal plate was used to maintain the sample temperature of all measurements at 22° C. All doses are expressed in Gy(SiO2).…”

Section: B Spectral Ria Measuring Setupmentioning

confidence: 99%

Radiation Monitoring With Radiosensitive Pure-Silica Core Ultralow Loss Optical Fiber

Weninger,

Morana,

Campanella

et al. 2024

IEEE Trans. Nucl. Sci.

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This article presents a new prospect for radiation detection exploiting the high radiation sensitivity of an ultra-low loss pure-silica core optical fiber (ULL-PSCF). This fiber exhibits very high transient X-ray radiation-induced attenuation (RIA) levels from UV to IR during irradiation while its RIA quickly returns to a low permanent level after irradiation. In this work, the RIA kinetics are investigated exposing the ULL-PSCF to multiple short irradiation runs at different dose rates. A pre-irradiation has been demonstrated to stabilize the response of the optical fiber and to make it even more appealing for radiation detection and monitoring. After this pre-irradiation treatment, the RIAs at 620 nm and 1310 nm in particular exhibit an ON/OFF behavior: the permanent RIA is nearly zero in-between irradiation and the transient RIA quickly increases up to dB/m level when the ULL-PSCF is exposed to X-rays. By varying the fiber length and adapting the interrogation setup, large ranges of doses and dose rates can be detected with this new class of optical fibers.

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Simulation and Optimization of Optical Fiber Irradiation with X-rays at Different Energies

Cited by 15 publications

References 42 publications

Effects of Measurement Temperature on Radioluminescence Processes in Cerium-Activated Silica Glasses for Dosimetry Applications

Effects of Measurement Temperature on Radioluminescence Processes in Cerium-Activated Silica Glasses for Dosimetry Applications

Distributed Optical Fiber-Based Radiation Detection Using an Ultra-Low-Loss Optical Fiber

Radiation Monitoring With Radiosensitive Pure-Silica Core Ultralow Loss Optical Fiber

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