Medipix2 as a highly flexible scanning/imaging detector for transmission electron microscopy

MacRaighne, A., Fernandez, G.V., Maneuski, D., McGrouther, D. and O'Shea, V. (2011) Medipix2 as a highly flexible scanning/imaging detector for transmission electron microscopy. Journal of Instrumentation, 6(1), C01047. (doi:10.1088/1748-0221/6/01/C01047)

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Abstract

The transmission electron microscope (TEM) is an indispensable tool for the study of magnetic micro- and nano-structures. High resolution digital detectors have largely replaced film as the primary detection method for electron microscopy. In this study we assess the benefits of using the Medipix2 chip, bump bonded to a 300 μm Si detector, as a flexible dual purpose detector for scanning/imaging mode operation on a Philips CM20 FEG TEM/STEM at the University of Glasgow. Specifically, the magnetic imaging modes of Fresnel and Differential phase contrast (DPC) were utilised and the performance of the Medipix chip compared to that of the CCD and the segmented photodiode normally used for these techniques. The Medipix detector matched the performance of the segmented detector for DPC imaging while offering greater flexibility in the approach. It also shown an improvement of > 60 in the signal to noise performance over the CCD used for Fresnel imaging.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGrouther, Dr Damien and O'Shea, Professor Valentine and Maneuski, Dr Dzmitry and MacRaighne, Dr Aaron
Authors: MacRaighne, A., Fernandez, G.V., Maneuski, D., McGrouther, D., and O'Shea, V.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Instrumentation
Publisher:Institute of Physics Publishing Ltd.
ISSN:1748-0221
ISSN (Online):1748-0221

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