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Validation of Geant4 Pixel Detector Simulation Framework by Measurements with the Medipix Family Detectors
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0002-5619-409X
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. University of Heidelberg, Heidelberg, Germany.
Paul Scherrer Institute, Villigen, Switzerland.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
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2016 (English)In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 63, no 3, 1874-1881 p., 7497723Article in journal (Refereed) Published
Abstract [en]

Monte Carlo simulations are an extensively used tool for developingand understanding radiation detector systems. In this work, we usedresults of several chips and readout modes of the Medipix detector family to validatea Geant4 based pixel detector framework, developed in our group, thatis capable of simulating particle tracking, charge transport in thesensor material and different readout schemes. We experimentally verifiedthe simulation with different detector geometries in terms of pixelpitch and size as well as sensor material and sensor thickness. Thesingle pixel mode (SPM) and charge summing mode (CSM) in Medipix3 were evaluated with fluorescenceand synchrotron radiation. The integration of the charge sensitiveamplifier functionality in the simulation framework allowed to simulatethe time-over-threshold mode of the Timepix chip.Simulation and measurement have been compared in terms of spectralresolution using threshold scans in photon counting mode (Medipix3) and time over thresholdmode (Timepix). Furthercomparisons were done using X-ray tube spectra and beta decay to covera broad energy range. Additionally, TCAD simulations are performedas a comparison to a well-established simulation method. The resultsshow good agreement between simulation and measurement.

Place, publisher, year, edition, pages
2016. Vol. 63, no 3, 1874-1881 p., 7497723
Keyword [en]
Monte Carlo Simulation, Medipix, Timepix, photon counting detectors, x-ray, alpha-radiation
National Category
Accelerator Physics and Instrumentation
Identifiers
URN: urn:nbn:se:miun:diva-27746DOI: 10.1109/TNS.2016.2555958ISI: 000382463600021Scopus ID: 2-s2.0-84978249235Local ID: STCOAI: oai:DiVA.org:miun-27746DiVA: diva2:929878
Available from: 2016-05-20 Created: 2016-05-20 Last updated: 2017-06-30Bibliographically approved

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Krapohl, DavidSchubel, ArminThungström, GöranFröjdh, Christer
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CiteExportLink to record
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