A novel method to assess the incident angle and the LET of protons using a compact single-layer Timepix detector

Nabha, Racell; Hoey, Olivier Van; Granja, Carlos; Parisi, Amilcare; Saint-Hubert, Marijke De; Struelens, Lara; Oancea, Cristina; Sterpin, Edmond; Zach, V.; Štursa, Jan; Ruciński, Antoni; Gajewski, J.; Stasica, Paulina; Vanhavere, F.

doi:10.1016/j.radphyschem.2022.110349

Cited by 12 publications

(15 citation statements)

References 42 publications

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“…Other studies report the appearance of protons in a silicon pixel detector for radiation imaging 10 , 11 . The authors find tracks that look very similar to our own tracks when the protons are incident to the detector at large angles, supporting our proton origin theory for fat tracks.…”

Section: Introductionsupporting

confidence: 79%

Fat cosmic ray tracks in charge-coupled devices

Grosson

Nomerotski

Collaboration³

2023

J. Astron. Telesc. Instrum. Syst.

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.Cosmic rays are particles from the upper atmosphere, which often leave bright spots and trails in images from telescope charge-coupled devices (CCDs). We investigate so-called “fat” cosmic rays seen in images from Vera C. Rubin Observatory and the Subaru Telescope. These tracks are much wider and brighter than typical cosmic ray tracks and therefore are more capable of obscuring data in science images. By understanding the origins of these tracks, we can better ensure that they do not interfere with on-sky data. We compare the properties of these tracks to simulated and theoretical models to identify both the particles causing these tracks as well as the reason for their excess spread. We propose that the origin of these tracks is cosmic ray protons, which deposit much greater charge in the CCDs than typical cosmic rays due to their lower velocities. The generated charges then repel each other while drifting through the detector, resulting in a track that is much wider than typical tracks.

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Section: Introductionsupporting

confidence: 79%

Fat cosmic ray tracks in charge-coupled devices

Grosson

Nomerotski

Collaboration³

2023

J. Astron. Telesc. Instrum. Syst.

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“…Verification of the correct filter was tested by visualising the clusters that passed the filtration parameters. The energy distribution and LET is shown in figure 6 with shapes that can be described as a Gaussian or Landau distribution [12]. The histogram displays the same data as in figure 5 with the applied filters listed in table 2 in order to remove unwanted radiation, background events, and noisy pixels.…”

Section: Spectral-tracking Sensitive Particle Filteringmentioning

confidence: 99%

Spectral tracking of proton beams by the Timepix3 detector with GaAs, CdTe and Si sensors

et al. 2023

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Position and directional-sensitive spectrometry of energetic charged particles can be performed with high resolution and wide dynamic range (energy, direction) with the hybrid semiconductor pixel detectors Timepix/Timepix3. The choice of semiconductor sensor material, thickness, and properties such as the reverse bias voltage, greatly determine detector sensitivity and resolving power for spectrometry and particle tracking. We investigated and evaluated the spectral tracking resolving power such as deposited energy and linear-energy-transfer (LET) spectra with the Timepix3 detector with different semiconductor sensors, based on GaAs:Cr, CdTe, and Si, using well-defined radiation sources in terms of radiation type (protons), energy, and incident direction to the detector sensor. Measurements of particle incident direction in a wide range were performed with collimated monoenergetic proton beams of various energies in the range 8–31 MeV at the U120-M cyclotron at the NPI CAS Rez near Prague. All detectors were per-pixel calibrated. This work enables to examine and perform a detailed study of charge sharing and charge collection efficiency in semiconductor sensors. The results serve to optimise the detector chip-sensor assembly configuration for measurements especially with high-LET particles in ion radiotherapy and outer space. The work underway includes evaluation of newly refined semi-insulating GaAs sensors and improved radiation hard semiconductor sensors SiC.

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“…These and further steps of data processing are made using the integrated data processing engine (DPE) [20]. Developed by ADVACAM, the DPE tool performs data clustering, applies per-pixel energy calibration, and calculates for each particle track morphological and spectral parameters, including cluster size, length, roundness, deposited energy and LET [4,21,22].…”

Section: Data Processingmentioning

confidence: 99%

Silicon Carbide Timepix3 detector for quantum-imaging detection and spectral tracking of charged particles in wide range of energy and field-of-view

Novak,

Granja,

Sagatova

et al. 2023

J. Inst.

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The hybrid architecture of the Timepix (TPX) family of detectors enables the use of different semiconductor sensors, most commonly silicon (Si), as well as high-density materials such as Cadmium Telluride (CdTe) or Gallium Arsenide (GaAs). For this purpose, we explore the potential of a silicon carbide (SiC) sensor bump-bonded on a Timepix3 detector as a radiation imaging and particle tracking detector. SiC stands as a radiation-hard material also with the ability to operate at elevated temperatures up to several hundreds of degrees Celsius. As a result, this sensor material is more suitable for radiation harsh environments compared to conventional e.g., Si sensors. In this work, we evaluate the response for precise radiation spectrometry and high-resolution particle tracking of newly developed SiC Timepix3 detector which is built and operated as a compact radiation camera MiniPIX-Timepix3 with integrated readout electronics. Calibration measurements were conducted with mono-energetic proton beams with energies of 13, 22, and 31 MeV at the U-120M cyclotron at the Nuclear Physics Institute Czech Academy of Science (NPI CAS), Prague, as well as 100 and 226 MeV at the Proton Therapy Center Czech (PTC) in Prague. High-resolution pattern recognition analysis and single-particle spectral tracking are used for detailed inspection and understanding of the sensor response. Results include distributions of deposited energy and linear energy transfer (LET) spectra. The spatial uniformity of the pixelated detector response is examined in terms of homogeneously distributed deposited energy.

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A novel method to assess the incident angle and the LET of protons using a compact single-layer Timepix detector

Cited by 12 publications

References 42 publications

Fat cosmic ray tracks in charge-coupled devices

Fat cosmic ray tracks in charge-coupled devices

Spectral tracking of proton beams by the Timepix3 detector with GaAs, CdTe and Si sensors

Silicon Carbide Timepix3 detector for quantum-imaging detection and spectral tracking of charged particles in wide range of energy and field-of-view

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