Applications of pixellated GaAs X-ray detectors in a synchrotron radiation beam

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Watt, J and Bates, R and Campbell, M and Mathieson, K and Mikulec, B and O'Shea, V and Passmore, MS and Schwarz, C and Smith, KM and Whitehill, C (2001) Applications of pixellated GaAs X-ray detectors in a synchrotron radiation beam. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 460 (1). pp. 185-190. ISSN 0168-9002 (https://doi.org/10.1016/S0168-9002(00)01112-8)

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Abstract

Hybrid semiconductor pixel detectors are being investigated as imaging devices for radiography and synchrotron radiation beam applications. Based on previous work in the CERN RD19 and the UK IMPACT collaborations, a photon counting GaAs pixel detector (PCD) has been used in an X-ray powder diffraction experiment. The device consists of a 200 μm thick SI-LEC GaAs detector patterned in a 64×64 array of 170 μm pitch square pixels, bump-bonded to readout electronics operating in single photon counting mode. Intensity peaks in the powder diffraction pattern of KNbO3 have been resolved and compared with results using the standard scintillator, and a PCD predecessor (the Ω3). The PCD shows improved speed, dynamic range, 2-D information and comparable spatial resolution to the standard scintillator based systems. It also overcomes the severe dead time limitations of the Ω3 by using a shutter based acquisition mode. A brief demonstration of the possibilities of the system for dental radiography and image processing are given, showing a marked reduction in patient dose and dead time compared with film.

ORCID iDs

Watt, J, Bates, R, Campbell, M, Mathieson, K ORCID logoORCID: https://orcid.org/0000-0002-9517-8076, Mikulec, B, O'Shea, V, Passmore, MS, Schwarz, C, Smith, KM and Whitehill, C;
  • Item type:Article
    ID code:37555
    Dates:
    Date
    Event
    11 March 2001
    Published
    Notes:1st International Workshop on Radiation Imaging Detectors, SUNDSVALL, SWEDEN, JUN 13-17, 1999
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:09 Feb 2012 16:38
    Last modified:11 Nov 2024 10:04
    URI:https://strathprints.strath.ac.uk/id/eprint/37555
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