Development and characterization of a novel alpha particle SOI pixel sensor for neutron detection

Mendicino, R.; Arai, Y.; Betta, G-F. Dalla; Perenzoni, Matteo; Tosi, E.

doi:10.1088/1748-0221/17/08/c08012

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…In the case of 10 B with small cavities the efficiency can reach ∼30%. This is only a theoretical value because, due to their high aspect ratio, the cavities are not so easy to fill completely, as reported in [14].…”

Section: Monte Carlo Simulationmentioning

confidence: 89%

Characterization of 3D micro-structured TIMEPIX detectors for neutron imaging

Polo,

Mendicino,

Quaranta

et al. 2023

EPJ Web Conf.

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Neutron imaging provides additional information to X-ray imaging and can be used in many applications, for example, nuclear engineering, non-industrial diagnostics and homeland security. This paper presents the latest development results of a new 3D structured pixel detector for thermal neutron detection and imaging. The device is based on Medipix/Timepix read-out chip family. The detector, without converter materials, was initially tested in the laboratory with a 241Am source, to simulate events that are induced by reaction products of active material in the silicon bulk. Thanks to the analysis of the size of event clusters and deposited energy, α particles and noise signals were discriminated. The detector was also tested with β and γ sources, to study the effect of other radiation on the device. These results can be useful as a starting point for future experiments, where a neutron source will be used, after filling the cavities with active materials, such as 6Li or 10B. In this paper, the results of the characterization and a comparison between experimental data and Monte Carlo simulations are shown.

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Section: Monte Carlo Simulationmentioning

confidence: 89%

Characterization of 3D micro-structured TIMEPIX detectors for neutron imaging

Polo,

Mendicino,

Quaranta

et al. 2023

EPJ Web Conf.

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“…In this paper, we present a monolithic pixel sensor for thermal neutron imaging developed in the framework of the INFN DEEP_3D project (Detectors for neutron imaging with Embedded Electronics Produced in 3D technology) [ 18 ]. The detector is fabricated using CMOS SOI technology with Deep Reactive-Ion Etching (DRIE) post-processing on the backside, aiming at obtaining high aspect-ratio cavities to be filled with neutron converters.…”

Section: Introductionmentioning

confidence: 99%

A CMOS-MEMS Pixel Sensor for Thermal Neutron Imaging

Mendicino

Betta

2023

Micromachines

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A monolithic pixel sensor with high spatial granularity (35 × 40 μm2) is presented, aiming at thermal neutron detection and imaging. The device is made using the CMOS SOIPIX technology, with Deep Reactive-Ion Etching post-processing on the backside to obtain high aspect-ratio cavities that will be filled with neutron converters. This is the first monolithic 3D sensor ever reported. Owing to the microstructured backside, a neutron detection efficiency up to 30% can be achieved with a 10B converter, as estimated by the Geant4 simulations. Each pixel includes circuitry that allows a large dynamic range and energy discrimination and charge-sharing information between neighboring pixels, with a power dissipation of 10 µW per pixel at 1.8 V power supply. The initial results from the experimental characterization of a first test-chip prototype (array of 25 × 25 pixels) in the laboratory are also reported, dealing with functional tests using alpha particles with energy compatible with the reaction products of neutrons with the converter materials, which validate the device design.

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Development and characterization of a novel alpha particle SOI pixel sensor for neutron detection

Cited by 2 publications

References 13 publications

Characterization of 3D micro-structured TIMEPIX detectors for neutron imaging

Characterization of 3D micro-structured TIMEPIX detectors for neutron imaging

A CMOS-MEMS Pixel Sensor for Thermal Neutron Imaging

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