Correcting for probe wandering by precession path segmentation
Citation:
Gregory Nordahl, Lewys Jones, Emil Frang Christiansen, Kasper Aas Hunnestad, Magnus Nord, 'Correcting for probe wandering by precession path segmentation', Ultramicroscopy, 2023, 248, 113715Download Item:
Abstract:
Precession electron diffraction has in the past few decades become a powerful technique for structure solving, strain analysis, and orientation mapping, to name a few. One of the benefits of precessing the electron beam, is increased reciprocal space resolution, albeit at a loss of spatial resolution due to an effect referred to as ‘probe wandering’. Here, a new methodology of precession path segmentation is presented to counteract this effect and increase the resolution in reconstructed virtual images from scanning precession electron diffraction data. By utilizing fast pixelated electron detector technology, multiple frames are recorded for each azimuthal rotation of the beam, allowing for the probe wandering to be corrected in post-acquisition processing. Not only is there an apparent increase in the resolution of the reconstructed images, but probe wandering due to instrument misalignment is reduced, potentially easing an already difficult alignment procedure.
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Grant Number
Science Foundation Ireland
URF/RI/191637
Author's Homepage:
http://people.tcd.ie/jonesl1Description:
PUBLISHED
Author: Jones, Lewys
Sponsor:
Science Foundation IrelandType of material:
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Series/Report no:
Ultramicroscopy;248;
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Full text availableKeywords:
Electron diffraction, Precession, Aberrations, AlignmentDOI:
https://doi.org/10.1016/j.ultramic.2023.113715Metadata
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