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1.
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The Dosepix detector—an energy-resolving photon-counting pixel detector for spectrometric measurements
/ Zang, A (U. Erlangen-Nuremberg (main)) ; Anton, G (U. Erlangen-Nuremberg (main)) ; Ballabriga, R (CERN) ; Bisello, F (U. Erlangen-Nuremberg (main) ; IBA Dosimetry, Schwarzenbruck) ; Campbell, M (CERN) ; Celi, J C (IBA Dosimetry, Schwarzenbruck) ; Fauler, A (U. Freiburg) ; Fiederle, M (U. Freiburg) ; Jensch, M (IBA Dosimetry, Schwarzenbruck) ; Kochanski, N (IBA Dosimetry, Schwarzenbruck) et al.
The Dosepix detector is a hybrid photon-counting pixel detector based on ideas of the Medipix and Timepix detector family. 1 mm thick cadmium telluride and 300 μm thick silicon were used as sensor material. [...]
2015 - 11 p.
- Published in : JINST 10 (2015) C04015
IOP Open Access article: PDF;
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2.
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Energy weighted x-ray dark-field imaging
/ Pelzer, Georg (Erlangen - Nuremberg U., ECAP) ; Zang, Andrea (Erlangen - Nuremberg U., ECAP) ; Anton, Gisela (Erlangen - Nuremberg U., ECAP) ; Bayer, Florian (Erlangen - Nuremberg U., ECAP) ; Horn, Florian (Erlangen - Nuremberg U., ECAP) ; Kraus, Manuel (Erlangen - Nuremberg U., ECAP) ; Rieger, Jens (Erlangen - Nuremberg U., ECAP) ; Ritter, Andre (Erlangen - Nuremberg U., ECAP) ; Wandner, Johannes (Erlangen - Nuremberg U., ECAP) ; Weber, Thomas (Erlangen - Nuremberg U., ECAP) et al.
The dark-field image obtained in grating-based x-ray phase-contrast imaging can provide information about the objects' microstructures on a scale smaller than the pixel size even with low geometric magnification. In this publication we demonstrate that the dark-field image quality can be enhanced with an energy-resolving pixel detector. [...]
2014
- Published in : Opt. Express 22 (2014) 24507
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3.
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How spectroscopic x-ray imaging benefits from inter-pixel communication
/ Koenig, Thomas (Forschungszentrum Karlsruhe, ANKA) ; Zuber, Marcus (Forschungszentrum Karlsruhe, ANKA) ; Hamann, Elias (Freiburg U. ; Forschungszentrum Karlsruhe, ANKA) ; Cecilia, Angelica (Forschungszentrum Karlsruhe, ANKA) ; Ballabriga, Rafael (CERN) ; Campbell, Michael (CERN) ; Ruat, Marie (ESRF, Grenoble) ; Tlustos, Lukas (CERN) ; Fauler, Alex (Freiburg U.) ; Fiederle, Michael (Freiburg U. ; Forschungszentrum Karlsruhe, ANKA) et al.
Spectroscopic x-ray imaging based on pixellated semiconductor detectors can be sensitive to charge sharing and K-fluorescence, depending on the sensor material used, its thickness and the pixel pitch employed. As a consequence, spectroscopic resolution is partially lost. [...]
2014 - 19 p.
- Published in : Phys. Med. Biol. 59 (2014) 6195-6213
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4.
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Charge Summing in Spectroscopic X-Ray Detectors With High-Z Sensors
/ Koenig, Thomas (Forschungszentrum Karlsruhe, ANKA) ; Procz, Simon (Freiburg U.) ; Cecilia, Angelica (Forschungszentrum Karlsruhe, ANKA) ; Ballabriga, Rafael (CERN) ; Baumbach, Tilo (Forschungszentrum Karlsruhe, ANKA) ; Llopart, Xavier (CERN) ; Fiederle, Michael (Freiburg U.) ; Zuber, Marcus (Forschungszentrum Karlsruhe, ANKA) ; Hamann, Elias (Forschungszentrum Karlsruhe, ANKA) ; Fauler, Alex (Freiburg U.) et al.
The spectroscopic performance of photon counting detectors is limited by the effects of charge sharing between neighboring pixels and the emission of characteristic X-rays. For these reasons, an event can be either missed or counted more than once. [...]
2013
- Published in : IEEE Trans. Nucl. Sci. 60 (2013) 4713-4718
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5.
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The Medipix3RX: A high resolution, zero dead-time pixel detector readout chip allowing spectroscopic imaging
/ Ballabriga, R (CERN) ; Alozy, J (CERN) ; Blaj, G (CERN) ; Campbell, M (CERN) ; Fiederle, M (Freiburg U.) ; Frojdh, E (CERN) ; Heijne, E H M (CERN ; IEAP CTU, Prague ; NIKHEF, Amsterdam) ; Llopart, X (CERN) ; Pichotka, M (Freiburg U.) ; Procz, S (Freiburg U.) et al.
The Medipix3 chips have been designed to permit spectroscopic imaging in highly segmented hybrid pixel detectors. Spectral degradation due to charge sharing in the sensor has been addressed by means of an architecture in which adjacent pixels communicate in the analog and digital domains on an event-by-event basis to reconstruct the deposited charge in a neighbourhood prior to the assignation of the hit to a single pixel. [...]
2013
- Published in : JINST 8 (2013) C02016
IOP Open Access article: PDF;
In : iWoRID 2012 - 14th International Workshop on Radiation Imaging Detectors, Figueira Da Foz, Portugal, 1 - 5 Jul 2012, pp.C02016
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6.
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Characterization of the Medipix3 pixel readout chip
/ Ballabriga, R (CERN) ; Tlustos, L (CERN) ; Wong, W (CERN) ; Greiffenberg, D (Freiburg U.) ; Turecek, D (Prague, Tech. U.) ; Blaj, G (CERN) ; Heijne, E H M (CERN) ; Plackett, R (Glasgow U. ; CERN) ; Campbell, M (CERN) ; Procz, S (Freiburg U.) et al.
The Medipix3 chip is a hybrid pixel detector readout chip working in Single Photon Counting Mode. It has been developed with a new front-end architecture aimed at eliminating the spectral distortion produced by charge diffusion in highly segmented semiconductor detectors. [...]
2011
- Published in : JINST 6 (2011) C01052
IOP Open Access article: PDF;
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7.
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8.
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The Medipix2-based network for measurement of spectral characteristics and composition of radiation in ATLAS detector
/ Vykydala, Z (Prague, Tech. U.) ; Bouchami, J (Montreal U.) ; Campbell, M (CERN) ; Dolezal, Z (Charles U.) ; Fiederle, M (Freiburg U.) ; Greiffenberg, D (Freiburg U.) ; Gutierrez, A (Montreal U.) ; Heijne, E (CERN) ; Holy, T (Prague, Tech. U.) ; Idarraga, J (Montreal U.) et al.
The ATLAS detector is now installed at the CERN LHC and a precise evaluation of the radiation environment within and around the detector is required to understand the performance of the various detector systems, and to predict their useful lifetime. Furthermore, validation of earlier Monte Carlo predictions about the radiation field in ATLAS is necessary. [...]
2009
- Published in : Nucl. Instrum. Methods Phys. Res., A 607 (2009) 35-37
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