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Spectral response of the energy-binning Dosepix ASIC coupled to a 300 mu m silicon sensor under high fluxes of synchrotron radiation
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. CERN, Geneva, Switzerland.
IBA Dosimetty GmbH, Schwarzenhatck, Germany.;FAU Univ Erlangen Nrnberg, Erlangen, Germany..
CERN, Geneva, Switzerland..
CERN, Geneva, Switzerland.;Univ Lausanne Hosp, Inst Radiat Phys, Lausanne, Switzerland..
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2015 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 804, p. 43-49Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

The Dosepix hybrid pixel detector was designed for dosimetry and radiation monitoring applications. It has three programmable modes of operation: photon counting mode, energy integration mode, and dosimetry mode. The dosimetry mode measures the energy of individual X-ray photons and automatically sorts events into pre-defined energy bins. The output is a histogram representing the measured X-ray energy spectrum, permitting a dose reconstruction that accounts for the attenuation of photons at each energy bin. This presents a potential radiation protection and dosimetry instrument in medical radiodiagnostic practices, including high flux systems such as computed tomography (CT). In this paper, we characterise the Dosepix chip by investigating the energy response and count rate capabilities when coupled to a 300 pm silicon sensor under high fluxes of monochromatic synchrotron radiation. Under nominal settings, the Dosepix detector can detect photons down to 3.5 keV, with an energy resolution of 16.5% FWHM for 8.5 keV photons and 8% FWHM for 40 keV photons. The chip can count up to 1.67 Mcps/mm(2) of 40 keV photons whilst maintaining linear counting behaviour. This count rate range can be further increased by changing the programmable operating settings of the detector, making it suitable for a range of photon dosimetry applications.

Place, publisher, year, edition, pages
2015. Vol. 804, p. 43-49
Keywords [en]
Hybrid pixel detector, Time over threshold, Energy binning, X-ray dosimetry
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-26519DOI: 10.1016/j.nima.2015.09.018ISI: 000364133700005Scopus ID: 2-s2.0-84943514621Local ID: STCOAI: oai:DiVA.org:miun-26519DiVA, id: diva2:882955
Available from: 2015-12-16 Created: 2015-12-16 Last updated: 2017-12-01Bibliographically approved
In thesis
1. Hybrid pixel detectors: Characterization and optimization
Open this publication in new window or tab >>Hybrid pixel detectors: Characterization and optimization
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2015. p. 209
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 228
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-26794 (URN)STC (Local ID)978-91-88025-37-1 (ISBN)STC (Archive number)STC (OAI)
Public defence
2015-09-08, O102, Sundsvall, 13:00 (English)
Supervisors
Note

Vid tidpunkten för disputationen var följande delarbete opublicerat: delarbete 8 inskickat.

At the time of the doctoral defence the following paper was unpublished: paper 8 submitted.

Available from: 2016-01-04 Created: 2016-01-04 Last updated: 2018-09-10Bibliographically approved

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Fröjdh, ErikWong, Winnie S.

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Electrical Engineering, Electronic Engineering, Information Engineering

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