Study of a GaAs:Cr-based Timepix Detector Using Synchrotron Facility Full article
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Journal of Instrumentation
ISSN: 1748-0221 |
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| Output data | Year: 2017, Volume: 12, Number: 11, Article number : P11009, Pages count : 13 DOI: 10.1088/1748-0221/12/11/p11009 | ||||||||
| Tags | Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc); Hybrid detectors; Materials for solid-state detectors; X-ray detectors | ||||||||
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Abstract:
High resistivity gallium arsenide compensated by chromium fabricated by Tomsk State University has demonstrated a good suitability as a sensor material for hybrid pixel detectors used in X-ray imaging systems with photon energies up to 60 keV. The material is available with a thickness up to 1 mm and due to its Z number a high absorption efficiency in this energy region is provided. However, the performance of thick GaAs:Cr-based detectors in spectroscopic applications is limited by readout electronics with relatively small pixels due to the charge sharing effect. In this paper, we present the experimental investigation of the charge sharing effect contribution in the GaAs:Cr-based Timepix detector. By means of scanning the detector with a pencil photon beam generated by the synchrotron facility, the geometrical mapping of pixel sensitivity is obtained, as well as the energy resolution of a single pixel. The experimental results are supported by numerical simulations. The observed limitation of the GaAs:Cr-based Timepix detector for the high flux X-ray imaging is discussed. © 2017 IOP Publishing Ltd and Sissa Medialab.
Cite:
Smolyanskiy P.
, Kozhevnikov D.
, Bakina O.
, Chelkov G.
, Dedovich D.
, Kuper K.
, Fabelo A.L.
, Zhemchugov A.
Study of a GaAs:Cr-based Timepix Detector Using Synchrotron Facility
Journal of Instrumentation. 2017. V.12. N11. P11009 :1-13. DOI: 10.1088/1748-0221/12/11/p11009 WOS Scopus РИНЦ AN OpenAlex
Study of a GaAs:Cr-based Timepix Detector Using Synchrotron Facility
Journal of Instrumentation. 2017. V.12. N11. P11009 :1-13. DOI: 10.1088/1748-0221/12/11/p11009 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jul 14, 2017 |
| Accepted: | Oct 27, 2017 |
| Published print: | Nov 10, 2017 |
| Published online: | Nov 10, 2017 |
Identifiers:
| Web of science: | WOS:000415822400002 |
| Scopus: | 2-s2.0-85038558467 |
| Elibrary: | 35481166 |
| Chemical Abstracts: | 2018:2144970 |
| OpenAlex: | W2767792835 |