Conserving the Coherence and Uniformity of Third-Generation Synchrotron Radiation Beams: the Case of ID19, a `Long' Beamline at the ESRF

Espeso, J.I.; Cloetens, P.; Baruchel, J.; Härtwig, J.; Mairs, T.; Biasci, J.C.; Marot, G.; Salomé-Pateyron, M.; Schlenker, M.

doi:10.1107/S0909049598002271

Journal of Synchrotron Radiation Journal of
Synchrotron Radiation

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Figure 7
DuMond diagram corresponding to the production of an 18 keV beam at the ID19 beamline using an Si(111) crystal in symmetrical Bragg setting. The dashed region (divergence δ) corresponds to the diffracted beam. A small vibration of the monochromator (1 µrad) widens this region (dashed lines) and decreases the beam coherence when integrated over time.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 5| Part 5| September 1998| Pages 1243-1249

https://doi.org/10.1107/S0909049598002271

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