MiniPIX Timepix3 — a miniaturized radiation camera with onboard data processing for online characterization of wide-intensity mixed-radiation fields

Granja, Carlos; Jakůbek, J.; Soukup, P; Jakubek, M.; Tureček, D.; Marek, Lukáš; Oancea, Cristina; Gohl, Stefan; Bergmann, B.; Pospı́šil, S.; Malich, Milan; Vuolo, M.; Owens, A.; Zach, V.; Štursa, Jan; Chvátil, David; Olsansky, V.; Ruciński, Antoni; Gajewski, J.; Stasica, Paulina; Vykydal, Z.; Šolc, J.

doi:10.1088/1748-0221/17/03/c03019

Cited by 10 publications

(14 citation statements)

References 9 publications

(21 reference statements)

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“…We use a Timepix3 detector [12] with integrated readout electronics as a miniaturized radiation camera MiniPIX-TPX3 [27] from Advacam as shown in figure 1. The Timepix3 ASIC chip was equipped with a 500 μm silicon sensor.…”

Section: Radiation Camera Minipix Tpx3 With Neutron Converter Maskmentioning

confidence: 99%

Detection of fast neutrons with the pixel detector Timepix3

et al. 2023

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We examined the response of the pixel detector Timepix3 with silicon sensor to well-defined fast neutron fields. Part of the pixel detector silicon sensor was additionally equipped with a neutron mask of distinct converter regions. The mask consists of separate thermal and fast neutron regions using 6LiF and hydrogen (plastic) converters, respectively. Measurements were performed with mono-energetic fast neutrons produced at D-D and D-T sources from a Van de Graaff accelerator and a neutron generator, respectively. Data were collected with low background including measurements with moderator material to provide a thermalized neutron component. All the signals produced in the detector were analyzed and decomposed in terms of the spectral-tracking response of the pixel detector. The effect of the fast and thermal components of the neutron converter were determined and compared with direct interactions in the silicon sensor which are significant and can be dominant for fast neutrons. We identify and classify the neutron-induced tracks in terms of the broad-type particle-event track classes. A partial overlap is unavoidable with tracks from direct detection of other radiations in particular protons and low-energy light ions as well as X rays. This will limit the neutron-event discrimination in mixed-radiation fields. The detection response according sensor-mask region was examined and calibrated for the investigated neutron fields. The neutron detection efficiency is selectively derived for the detector particle-event classes. This approach enables to enhance the neutron-discrimination and suppress background and unwanted events. This work enables to extend the response matrix of the detector for broad-type radiations to include neutrons both fast and thermal. The results serve to enhance the sensitivity and determine the neutron component in unknown and mixed-radiation fields such as outer space and particle radiotherapy environments.

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Section: Radiation Camera Minipix Tpx3 With Neutron Converter Maskmentioning

confidence: 99%

Detection of fast neutrons with the pixel detector Timepix3

et al. 2023

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“…We examine and analyze the scattered particles in detail with spectral-sensitive tracking response in wide field-of-view (FoV). This is made possible by use of the pixel detector Timepix3 [5] assembled as a compact radiation camera [6] which can be easily placed in arbitrary proximity to the foil and safely away from the primary beam axis.…”

Section: Motivation Aimsmentioning

confidence: 99%

“…We use the miniaturized radiation camera MiniPIX-Timepix3 [6] equipped with the Timepix3 ASIC chip [5] bump-bonded to a 500 μm thick silicon sensor (figure 1a). The camera operates at room temperature with integrated power, control and data readout enabled via single USB 2.0 connector to standard PC.…”

Section: Miniaturized Radiation Camera Minipix-timepix3mentioning

confidence: 99%

Directional-sensitive wide field-of-view monitoring of high-intensity proton beams by spectral tracking of scattered particles with scattering foil and miniaturized radiation camera

Granja,

Uhlar,

Poklop

et al. 2024

J. Inst.

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Monitoring and characterization of particle beams in wide-range is often necessary in research and many applications with particle accelerators. The quantitative measurement and evaluation of composition especially of high-intensity beams are limited and can become a challenge with conventional methods especially with simplified instrumentation for ease of deployment. For this purpose, we developed a novel technique based on high-resolution spectral-sensitive tracking of single particles scattered from the beam path by a thin foil. We use a compact radiation camera equipped with the semiconductor pixel detector Timepix3 together with dedicated Monte-Carlo simulations. Particle-event type discrimination and directional information are produced by the detector spectral-tracking response together with particle-type resolving power derived from experimental calibrations. Directional- and spectral-sensitive components can be resolved in wide field-of-view. Quantification of the primary beam intensity is extrapolated by numerical calculations. Demonstration and evaluation of the technique are provided by measurements with 33 MeV protons from a light ion cyclotron accelerator. Scattered particles originating from the thin foil, the accelerator beam nozzle, and the air space along the beam path are detected and evaluated.

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“…For the experimental verification a 7×7 pixel matrix of Minipix Timepix3 [7] was irradiated with photons of an Am-241 source. The configuration of the simulation which was utilized to generate the probability maps matched the one used in the measurement (bias = 200 V for 500 μm Silicon sensor, DAC value for Ikrum = 5).…”

Section: Experimental Verification 241 Application Of Correction Maps...mentioning

confidence: 99%

Probability distribution maps of deposited energy with sub-pixel resolution for Timepix3 detectors

Christodoulou,

Alozy,

Ballabriga

et al. 2024

J. Inst.

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The Medipix3 Collaboration has developed the Timepix3 chip, which can provide information about individual particles interacting with a hybrid pixelated semiconductor detector. The Timepix3 generates a data packet including time and energy information for each pixel receiving a charge above the discriminator threshold. From a set of such packages generated by one particle the total deposited energy and the sub-pixel center of mass (c.m) position of the interaction can be calculated. However, sub-threshold losses will distort both the measured energy and c.m calculation. This work aims to generate probability maps for the most probable initial interaction position and energy for a given detected cluster. The correction maps were calculated for different energies and sub-pixel c.m positions. It is crucial to realistically simulate the front-end response of the Timepix3 detector to be able to match and understand the experimental data and generate accurate probability maps. The correction maps from the simulations using the simulation tool Allpix 2 are applied to experimental data utilizing an Am-241 source to irradiate a Minipix Timepix3, leading to sub-pixel resolution and improved energy resolution for Timepix3 detectors.

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MiniPIX Timepix3 — a miniaturized radiation camera with onboard data processing for online characterization of wide-intensity mixed-radiation fields

Cited by 10 publications

References 9 publications

Detection of fast neutrons with the pixel detector Timepix3

Detection of fast neutrons with the pixel detector Timepix3

Directional-sensitive wide field-of-view monitoring of high-intensity proton beams by spectral tracking of scattered particles with scattering foil and miniaturized radiation camera

Probability distribution maps of deposited energy with sub-pixel resolution for Timepix3 detectors

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