Development of a hybrid gamma camera based on Timepix3 for nuclear industry applications

Amoyal, Guillaume; Schoepff, Vincent; Carrel, F.; Michel, Maugan; Lanaute, N. Blanc de; Angélique, Jean-Claude

doi:10.1016/j.nima.2020.164838

Cited by 22 publications

(9 citation statements)

References 19 publications

(26 reference statements)

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“…Usage as a single-layer Compton camera (CC) and scatter polarimeter Individual-particle detection, 3D reconstruction and a decent spectroscopic performance provide the means of using the device as a single-layer CC and scatter polarimeter [28], e.g. localization of γ-sources during nuclear decommissioning activities [29], or for studying γ-ray sources in astroparticle physics. Figure 17 shows CC reconstructions of the 22…”

Section: 3mentioning

confidence: 99%

Characterization of a 5 mm thick CZT-Timepix3 pixel detector for energy-dispersive γ-ray and particle tracking

Smolyanskiy,

Bergmann,

Burian

et al. 2023

Phys. Scr.

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The present manuscript describes a comprehensive characterization of a novel highly segmented 5 mm CZT sensor attached to Timepix3. First, the sensor’s IV curve was measured and basic sensor characterization was done with laboratory γ-radiation sources. The sensor resistivity was determined to be (0.155± 0.02) GOhm · cm. The sensor showed decent homogeneity, both for the per-pixel count rate and electron mobility-lifetime product μ e τ e. The latter was measured to be μ e τ e ¯ = 1.3 × 10−3 cm2/V with a standard deviation σ = 0.4 × 10−3 cm2/V describing the dispersion of values for different pixels. The basic sensor characterization is complemented by measurements at grazing angle in a 120 GeV/c at the CERN’s Super Proton Synchrotron. The penetrating nature of these particles together with the pixelation of the sensor allows for a determination of the charge collection efficiency (CCE), as well as charge carrier drift properties (drift times, lateral charge cloud expansion) as a function of the interaction depths in the sensor. While CCE drops by 30%–40% towards the cathode side of the sensor, from the drift time dependency on interaction depth, the electron mobility μ e was extracted to be (944.8 ± 1.3) cm2/V/s and τ e = (1.38 ± 0.31) μs. The spectroscopic performance was assessed in photon fields and extracted from energy loss spectra measured at different angles in the pion beam. While at photon energies below 120 keV incomplete charge collection leads to an underestimation of the photon energy when irradiated from the front-side, at higher energies the relative energy resolution was found to be ∼4.5%, while a relative energy resolution of ∼7.5% was found for the particle energy loss spectra. It is shown that the drift time information can be used to reconstruct particle interactions in the sensor in 3D, providing a spatial resolution of σ xyz = 241 μm within the sensor volume and a particle trajectory measurement precision Δxyz = 100 μm, at a distance of 1 m from the sensor. We demonstrate by measurement with a 22Na source, that the energy resolution combined with the 3D reconstruction allows for detection of γ-ray source location and polarity using Compton scattering within the sensor (Compton camera and scatter polarimeter).

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Section: 3mentioning

confidence: 99%

Characterization of a 5 mm thick CZT-Timepix3 pixel detector for energy-dispersive γ-ray and particle tracking

Smolyanskiy,

Bergmann,

Burian

et al. 2023

Phys. Scr.

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“…As an alternative, several methods to perform measurements directly on-site have been investigated, most notably for long range radiation [4]. Many projects have developed cameras capable to image directly gamma (see for example [5,6,7]) or neutron radiation (see for example [8,9]). Thus, different industrial solutions are currently available commercially.…”

Section: Introductionmentioning

confidence: 99%

Development of a compact alpha and beta camera for dismantlement applications

Leblond

Fichet

Laumonier³

et al. 2022

J Radioanal Nucl Chem

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A new method has been developed to image surface contamination on-site by short range radiation emitters (such as alpha or beta particle emitters). The measurement is performed in direct contact with the contaminated surface and uses a solid scintillator coupled with Silicon Photomultiplier (SiPM) arrays. The signal readout is processed using a dedicated electronic.The experimental setup used to acquire the data, as well as the analysis procedure, are described and the results are discussed with regard to dismantling requirements. Image reconstruction is investigated using various algorithms. A proof of principle is performed in laboratory using a simple prototype and multiple alpha and beta sources. All the common beta and alpha emitters are detected (including tritium) and tests on gamma radiation are also performed. The minimum detectable activity is estimated to be 0.4 Bq/cm² for beta radiations ( 14 C) and 0.3 Bq/cm² for alpha radiations ( 239 Pu). Finally, promising discrimination capability of the prototype is highlighted.

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“…Radiation detectors are suitable for use in environmental radiation detection and medical imaging due to their portability features coupled with high detection efficiencies and large field of view [ 1 , 2 , 3 ]. In recent years, portable gamma camera systems have attracted attention not only in radio-guided surgery [ 4 , 5 ], but also in radiation security to minimize radiation exposure and detect radiation sources [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Portable Gamma Radiation Sensor Based on a Monolithic Lutetium-Yttrium Oxyorthosilicate Ring

Zhang

Xie

et al. 2021

Sensors

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Portable radiation detectors are widely used in environmental radiation detection and medical imaging due to their portability feature, high detection efficiency, and large field of view. Lutetium-yttrium oxyorthosilicate (LYSO) is a widely used scintillator in gamma radiation detection. However, the structure and the arrangement of scintillators limit the sensitivity and detection accuracy of these radiation detectors. In this study, a novel portable sensor based on a monolithic LYSO ring was developed for the detection of environmental radiation through simulation, followed by construction and assessments. Monte Carlo simulations were utilized to prove the detection of gamma rays at 511 keV by the developed sensor. The simulations data, including energy resolutions, decoding errors, and sensitivity, showed good potential for the detection of gamma rays by the as-obtained sensor. The experimental results using the VA method revealed decoding errors in the energy window width of 50 keV less than 2°. The average error was estimated at 0.67°, a sufficient value for the detection of gamma radiation. In sum, the proposed radiation sensor appears promising for the construction of high-performance radiation detectors and systems.

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Development of a hybrid gamma camera based on Timepix3 for nuclear industry applications

Cited by 22 publications

References 19 publications

Characterization of a 5 mm thick CZT-Timepix3 pixel detector for energy-dispersive γ-ray and particle tracking

Characterization of a 5 mm thick CZT-Timepix3 pixel detector for energy-dispersive γ-ray and particle tracking

Development of a compact alpha and beta camera for dismantlement applications

A Novel Portable Gamma Radiation Sensor Based on a Monolithic Lutetium-Yttrium Oxyorthosilicate Ring

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