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@ARTICLE{Chang:189241,
author = {Chang, S and Dwyer, Christian and Boothroyd, Christopher
Brian and Dunin-Borkowski, Rafal},
title = {{O}ptimising electron holography in the presence of partial
coherence and instrument instabilities},
journal = {Ultramicroscopy},
volume = {151},
issn = {0304-3991},
address = {Amsterdam},
publisher = {Elsevier Science},
reportid = {FZJ-2015-02429},
pages = {37 - 45},
year = {2015},
abstract = {Off-axis electron holography provides a direct means of
retrieving the phase of the wavefield in a transmission
electron microscope, enabling measurement of electric and
magnetic fields at length scales from microns to nanometers.
To maximise the accuracy of the technique, it is important
to acquire holograms using experimental conditions that
optimise the phase resolution for a given spatial
resolution. These conditions are determined by a number of
competing parameters, especially the spatial coherence and
the instrument instabilities. Here, we describe a simple,
yet accurate, model for predicting the dose rate and
exposure time that give the best phase resolution in a
single hologram. Experimental studies were undertaken to
verify the model of spatial coherence and instrument
instabilities that are required for the optimisation. The
model is applicable to electron holography in both standard
mode and Lorentz mode, and it is relatively simple to
apply.},
cin = {PGI-5},
ddc = {570},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000351237800006},
doi = {10.1016/j.ultramic.2014.11.019},
url = {https://juser.fz-juelich.de/record/189241},
}