TY  - JOUR
AU  - Strauch, Achim
AU  - Weber, Dieter
AU  - Clausen, Alexander
AU  - Lesnichaia, Anastasiia
AU  - Bangun, Arya
AU  - März, Benjamin
AU  - Lyu, Feng Jiao
AU  - Rosenauer, Andreas
AU  - Dunin-Borkowski, Rafal
AU  - Müller-Caspary, Knut
AU  - Chen, Qingping
TI  - Live Processing of Momentum-Resolved STEM Data for First Moment Imaging and Ptychography
JO  - Microscopy and microanalysis
VL  - 27
IS  - 5
SN  - 1431-9276
CY  - New York, NY
PB  - Cambridge University Press
M1  - FZJ-2021-03080
SP  - 1078–1092
PY  - 2021
AB  - A reformulated implementation of single-sideband ptychography enables analysis and display of live detector data streams in 4D scanning transmission electron microscopy (STEM) using the LiberTEM open-source platform. This is combined with live first moment and further virtual STEM detector analysis. Processing of both real experimental and simulated data shows the characteristics of this method when data are processed progressively, as opposed to the usual offline processing of a complete data set. In particular, the single-sideband method is compared with other techniques such as the enhanced ptychographic engine in order to ascertain its capability for structural imaging at increased specimen thickness. Qualitatively interpretable live results are obtained also if the sample is moved, or magnification is changed during the analysis. This allows live optimization of instrument as well as specimen parameters during the analysis. The methodology is especially expected to improve contrast- and dose-efficient in situ imaging of weakly scattering specimens, where fast live feedback during the experiment is required.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000697254900011
DO  - DOI:10.1017/S1431927621012423
UR  - https://juser.fz-juelich.de/record/894189
ER  -