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Figure 6
Measured relative focus and source position change under different undulator configurations. (Left) Different tapering of the undulators under each configuration. The normal operation mode, full undulator, is used as the reference point. Positive positions are further downstream along the beam path and negative positions are upstream. The results are statistics derived on running averages of the raw measurements from the experiments. Each raw measurement uses one single-shot image, and the running average uses 100 raw measurements. The uncertainties of the results are represented as ±1 standard deviation of all 10 000 measurements (after the running average) for each undulator configuration.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 2| March 2020| Pages 254-261
https://doi.org/10.1107/S1600577519017107
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