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1.
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A simulator for Timepix-like pixel front-ends
/ Sune, R Ballabriga (CERN) ; Bromberger, H (DESY) ; Campbell, M (CERN) ; Cudie, X Llopart (CERN) ; Christodoulou, P (CERN ; IEAP CTU, Prague) ; Sriskaran, V (CERN) ; Tlustos, L (CERN ; IEAP CTU, Prague)
This work presents the development of a front-end simulation code for the Timepix3 readout chip [1], intended as digitizer stage in full detector simulation. The front-end electronics is modelled using an integrator stage and 3 parallel feedback loops with individually configurable time constants. [...]
2024 - 8 p.
- Published in : JINST 19 (2024) C03022
Fulltext: PDF;
In : 16th Topical Seminar on Innovative Particle and Radiation Detectors, Siena, Italy, 25 - 29 Sep 2023, pp.C03022
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2.
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High-rate, high-resolution single photon X-ray imaging: Medipix4, a large 4-side buttable pixel readout chip with high granularity and spectroscopic capabilities
/ Sriskaran, Viros (CERN) ; Alozy, Jerome (CERN) ; Ballabriga, Rafael (CERN) ; Campbell, Michael (CERN) ; Christodoulou, Pinelopi (CERN ; CTU, Prague) ; Heijne, Erik (CTU, Prague) ; Koukab, Adil (Ecole Polytechnique, Lausanne) ; Kugathasan, Thanushan (CERN) ; Llopart, Xavier (CERN) ; Piller, Markus (CERN ; Graz, Tech. U.) et al.
The Medipix4 chip is the latest member in the Medipix/Timepix family of hybrid pixel detector chips aimed at high-rate spectroscopic X-ray imaging using high-Z materials. It can be tiled on all 4 sides making it ideal for constructing large-area detectors with minimal dead area. [...]
arXiv:2310.10188.-
2024-02-16 - 15 p.
- Published in : JINST 19 (2024) P02024
Fulltext: 2310.10188 - PDF; Publication - PDF;
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3.
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Active Personal Eye Lens Dosimetry With the Hybrid Pixelated Dosepix Detector
/ Beißer, Florian (Erlangen - Nuremberg U., ECAP) ; Haag, Dennis (Erlangen - Nuremberg U., ECAP) ; Ballabriga, Rafael (CERN) ; Behrens, Rolf (Braunschweig, Phys. Tech. Bund.) ; Campbell, Michael (CERN) ; Fuhg, Christian (Braunschweig, Phys. Tech. Bund.) ; Hufschmidt, Patrick (Erlangen - Nuremberg U., ECAP) ; Hupe, Oliver (Braunschweig, Phys. Tech. Bund.) ; Kupillas, Carolin (Erlangen - Nuremberg U., ECAP) ; Llopart, Xavier (CERN) et al.
Eye lens dosimetry has been an important field of research in the last decade. Dose measurements with a prototype of an active personal eye lens dosemeter based on the Dosepix detector are presented. [...]
arXiv:2305.05470.-
2023 - 9 p.
- Published in : IEEE Trans. Rad. Plasma Med. Sci. 7 (2023) 879-887
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4.
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Personal Dosimetry in Continuous Photon Radiation Fields With the Dosepix Detector
/ Haag, Dennis (Erlangen Ctr. Astropart. Phys., Erlangen) ; Schmidt, Sebastian (Erlangen Ctr. Astropart. Phys., Erlangen) ; Hufschmidt, Patrick (Erlangen Ctr. Astropart. Phys., Erlangen) ; Eberle, Franziska (Erlangen Ctr. Astropart. Phys., Erlangen) ; Michel, Thilo (Erlangen Ctr. Astropart. Phys., Erlangen) ; Anton, Gisela (Erlangen Ctr. Astropart. Phys., Erlangen) ; Hupe, Oliver (PTB, Brunswick) ; Roth, Jurgen (PTB, Brunswick) ; Fuhg, Christian (PTB, Brunswick) ; Zutz, Hayo (PTB, Brunswick) et al.
First measurements characterizing dosimetric properties of a dosimetry system designed for the purpose of active personal dosimetry for photons with mean energies from 12.4 to 1250 keV according to Physikalisch-Technische Bundesanstalt (PTB) requirements are presented. The system consists of three Dosepix detectors, which is a hybrid, pixelated, photon-counting X-ray detector. [...]
2021 - 6 p.
- Published in : IEEE Transactions on Nuclear Science 68 (2021) 1129-1134
Fulltext: PDF;
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5.
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The Timepix4 analog front-end design: Lessons learnt on fundamental limits to noise and time resolution in highly segmented hybrid pixel detectors
/ Ballabriga, R (CERN) ; Alozy, J A (CERN) ; Bandi, F N (CERN) ; Blaj, G (SLAC) ; Campbell, M (CERN) ; Christodoulou, P (CERN ; IEAP CTU, Prague ; Prague, Tech. U.) ; Coco, V (CERN) ; Dorda, A (CERN ; KIT, Karlsruhe, IPE) ; Emiliani, S (CERN ; Ecole Polytechnique, Lausanne) ; Heijhoff, K (Nikhef, Amsterdam) et al.
This manuscript describes the optimization of the front-end readout electronics for high granularity hybrid pixel detectors. The theoretical study aims at minimizing the noise and jitter. [...]
2023 - 17 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1045 (2023) 167489
Fulltext: PDF;
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6.
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Timepix4, a large area pixel detector readout chip which can be tiled on 4 sides providing sub-200 ps timestamp binning
/ Llopart, X (CERN) ; Alozy, J (CERN) ; Ballabriga, R (CERN) ; Campbell, M (CERN) ; Casanova, R (Barcelona, IFAE) ; Gromov, V (Nikhef, Amsterdam) ; Heijne, E H M (CERN ; IEAP CTU, Prague) ; Poikela, T (CERN) ; Santin, E (CERN) ; Sriskaran, V (CERN) et al.
Timepix4 is a 24.7 × 30.0 mm$^{2}$ hybrid pixel detector readout ASIC which has been designed to permit detector tiling on 4 sides. It consists of 448 × 512 pixels which can be bump bonded to a sensor with square pixels at a pitch of 55 µm. [...]
2022 - 15 p.
- Published in : JINST 17 (2022) C01044
Fulltext: PDF;
In : 22nd International Workshop on Radiation Imaging Detectors, Online, 27 Jun - 1 Jul 2021, pp.C01044
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7.
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Study of low power front-ends for hybrid pixel detectors with sub-ns time tagging
/ Llopart, X (CERN) ; Alozy, J (CERN) ; Ballabriga, R (CERN) ; Campbell, M (CERN) ; Egidos, N (CERN) ; Fernandez, J M (CERN) ; Heijne, E (CERN) ; Kremastiotis, I (CERN) ; Santin, E (CERN) ; Tlustos, L (CERN) et al.
Power consumption is always a concern in the design of readout chips for hybrid pixel
detectors. The Timepix3 chip is capable of dealing with up to 80 Mhits/cm$^2$/sec and tagging each hit
within a time bin of 1.56 ns. [...]
2019 - 9 p.
- Published in : JINST 14 (2019) C01024
In : 20th International Workshop On Radiation Imaging Detectors, Sundsvall, Sweden, 24 - 28 Jun 2018, pp.C01024
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8.
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9.
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Personal Dosimetry in Direct Pulsed Photon Fields with the Dosepix Detector
/ Haag, Dennis (Erlangen - Nuremberg U.) ; Schmidt, Sebastian (Erlangen - Nuremberg U., ECAP ; Erlangen - Nuremberg U.) ; Hufschmidt, Patrick (Erlangen - Nuremberg U., ECAP ; Erlangen - Nuremberg U.) ; Anton, Gisela (Erlangen - Nuremberg U., ECAP ; Erlangen - Nuremberg U.) ; Ballabriga, Rafael (CERN) ; Behrens, Rolf (New Brunswick U. ; Braunschweig Tech. U.) ; Campbell, Michael (CERN) ; Eberle, Franziska (Erlangen - Nuremberg U., ECAP ; Erlangen - Nuremberg U.) ; Fuhg, Christian (New Brunswick U. ; Braunschweig Tech. U.) ; Hupe, Oliver (New Brunswick U. ; Braunschweig Tech. U.) et al.
First investigations regarding dosimetric properties of the hybrid, pixelated, photon-counting Dosepix detector in the direct beam of a pulsed photon field (RQR8) for the personal dose equivalent $H\mathrm{_p(10)}$ are presented. The influence quantities such as pulse duration and dose rate were varied, and their responses were compared to the legal limits provided in PTB-A 23.2. [...]
arXiv:2106.06714.-
2022-12 - 5 p.
- Published in : IEEE Trans. Nucl. Sci. 69 (2022) 2330-2334
Fulltext: PDF;
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10.
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Photon Counting Detectors for X-ray Imaging with Emphasis on CT
/ Ballabriga, R (CERN) ; Alozy, J (CERN) ; Bandi, F N (CNA, Seville) ; Campbell, M (CERN) ; Egidos, N (CERN) ; Fernandez-Tenllado, J M (CERN) ; Heijne, E H M (CERN ; IEAP CTU, Prague) ; Kremastiotis, I (CERN) ; Llopart, X (CERN) ; Madsen, B J (CERN) et al.
X-ray imaging is a widely used imaging modality in
the medical diagnostic field due to its availability, low cost, high
spatial resolution and fast image acquisition. X-ray photons in
standard X-ray sources are polychromatic [...]
2021 - 22 p.
- Published in : IEEE Trans. Rad. Plasma Med. Sci. 5 (2021) 1
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