Paterson, G. W. , Lamb, R. J., Ballabriga, R., Maneuski, D. , O'Shea, V. and McGrouther, D. (2020) Sub-100 nanosecond temporally resolved imaging with the Medipix3 direct electron detector. Ultramicroscopy, 210, 112917. (doi: 10.1016/j.ultramic.2019.112917)
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Abstract
Detector developments are currently enabling new capabilities in the field of Transmission Electron Microscopy (TEM). We have investigated the limits of a hybrid pixel detector, Medipix3, to record dynamic, time varying, electron signals. Operating with an energy of 60keV, we have utilised electrostatic deflection to oscillate electron beam position on the detector. Adopting a pump-probe imaging strategy we have demonstrated that temporal resolutions three orders of magnitude smaller than available for typically used TEM imaging detectors are possible. Our experiments have shown that energy deposition of the primary electrons in the hybrid pixel detector limits overall temporal resolution. Through adjustment of user specifiable thresholds or the use of charge summing mode, we have obtained images composed from summing 10,000s frames containing single electron events to achieve temporal resolution less than 100ns. We propose that this capability can be directly applied to studying repeatable material dynamic processes but also to implement low-dose imaging schemes in scanning transmission electron microscopy.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | McGrouther, Dr Damien and O'Shea, Professor Val and Lamb, Mr Raymond and Maneuski, Dr Dima and Paterson, Dr Gary |
| Authors: | Paterson, G. W., Lamb, R. J., Ballabriga, R., Maneuski, D., O'Shea, V., 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: | 07 December 2019 |
| Copyright Holders: | Copyright © 2019 The Authors |
| First Published: | First published in 210:112917 |
| Publisher Policy: | Reproduced under a Creative Commons license |
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