Paton, K. A. , Veale, M. C., Mu, X., Allen, C. S., Maneuski, D. , Kubel, C., O’Shea, V., Kirkland, A. I. and McGrouther, D. (2021) Quantifying the performance of a hybrid pixel detector with GaAs:Cr sensor for transmission electron microscopy. Ultramicroscopy, 227, 113298. (doi: 10.1016/j.ultramic.2021.113298)
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Abstract
Hybrid pixel detectors (HPDs) have been shown to be highly effective for diffraction-based and time-resolved studies in transmission electron microscopy, but their performance is limited by the fact that high-energy electrons scatter over long distances in their thick Si sensors. An advantage of HPDs compared to monolithic active pixel sensors is that their sensors do not need to be fabricated from Si. We have compared the performance of the Medipix3 HPD with a Si sensor and a GaAs:Cr sensor using primary electrons in the energy range of 60 - 300 keV. We describe the measurement and calculation of the detectors’ modulation transfer function (MTF) and detective quantum efficiency (DQE), which show that the performance of the GaAs:Cr device is markedly superior to that of the Si device for high-energy electrons.
Item Type: | Articles |
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Additional Information: | The authors gratefully acknowledge funding from the UK Science and Technology Facilities Council through the Industrial Cooperative Awards in Science & Technology (CASE) studentship “Next2 Detection - Investigation of Hybrid Pixel Detectors for Future Transmission Electron Microscopy Imaging” (grant no. ST/P002471/1). X.M. thanks Deutsche Forschungsgemeinschaft (DFG) for funding (grant no. MU 4276/1-1). K.A.P and D.McG. acknowledge Quantum Detectors Ltd. for funding travel to KNFC as part of the Industrial CASE studentship that supports K.A.P. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | McGrouther, Dr Damien and Maneuski, Dr Dima and Paton, Dr Kirsty |
Authors: | Paton, K. A., Veale, M. C., Mu, X., Allen, C. S., Maneuski, D., Kubel, C., O’Shea, V., Kirkland, A. I., and McGrouther, D. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Ultramicroscopy |
Publisher: | Elsevier |
ISSN: | 0304-3991 |
ISSN (Online): | 1879-2723 |
Published Online: | 29 April 2021 |
Copyright Holders: | Copyright © 2021 The Authors |
First Published: | First published in Ultramicroscopy 227: 113298 |
Publisher Policy: | Reproduced under a Creative Commons License |
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