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Developing a high-resolution x-ray imager using electron-multiplying (EM) CCDs

Tutt, James H.; Hall, David J.; Holland, Andrew D.; Murray, Neil J. and Endicott, James (2013). Developing a high-resolution x-ray imager using electron-multiplying (EM) CCDs. In: Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, SPIE, article no. 8852 17.

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Applications at synchrotron facilities such as macromolecular crystallography and high energy X-ray diffraction require high resolution imaging detectors with high dynamic range and large surface area. Current systems can be split into two main categories: hybrid pixel detectors and scintillator-coupled Charge-Coupled Devices (CCDs). Whilst both have limitations, CCD-based systems (coupled to fibre-optics to increase imaging area) are often used in these applications due to their small pixels and the high resolution. Electron-Multiplication CCDs (EM-CCDs) are able to suppress the readout noise associated with increased readout speed offering a low noise, high speed detector solution. A previous pilot study using a small-area (8 mm × 8 mm) scintillator-coupled EM-CCD found that through high frame-rates, low noise and novel uses of photon-counting, resolution could be improved from over 80 μm to 25 μm at 2 fps. To further improve this detector system, high speed readout electronics can be used alongside a fibre-optic taper and EM-CCD to create a “best of both worlds” solution consisting of the high resolution of a CCD, along with the low noise, high speed (high dynamic range) and large effective area of pixel detectors. This paper details the developments in the study and discusses the latest results and their implication on the system design.

Item Type: Conference or Workshop Item
Copyright Holders: 2013 Society of Photo-Optical Instrumentation Engineers, one print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
ISBN: 0-8194-9702-9, 978-0-8194-9702-4
ISSN: 0277-786X
Extra Information: Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV
Editors: Michael Fiederle; Arnold Burger; Larry Franks; Ralph B. James
Proceedings of SPIE Vol. 8852
Keywords: charge-coupled devices; electrons; X-ray imaging; sensors; scintillators; fiber optics; photon counting; electronics
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Centre for Electronic Imaging (CEI)
Item ID: 39011
Depositing User: David Hall
Date Deposited: 18 Nov 2013 10:41
Last Modified: 08 Dec 2018 01:26
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