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Characterising the Large Coherence Length at Diamond's Beamline I13L
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.ORCID iD: 0000-0003-0152-6533
KTH, School of Engineering Sciences (SCI), Applied Physics, Biomedical and X-ray Physics.ORCID iD: 0000-0002-4394-0591
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2016 (English)In: Proceedings of The 12th International Conference on Synchrotron Radiation Instrumentation (SRI2015), American Institute of Physics (AIP), 2016, 050022Conference paper, Published paper (Refereed)
Abstract [en]

I13 is a 250 m long hard x-ray beamline (6 keV to 35 keV) at the Diamond Light Source. The beamline comprises of two independent experimental endstations: one for imaging in direct space using x-ray microscopy and one for imaging in reciprocal space using coherent diffraction based imaging techniques [1]. An outstanding feature of the coherence branch, due to its length and a new generation of ultra-stable beamline instrumentation [2], is its capability of delivering a very large coherence length well beyond 200 m, providing opportunities for unique x-ray optical experiments. In this paper we discuss the challenges of measuring a large coherence length and present quantitative measurement based on analyzing diffraction patterns from a boron fiber [3]. We also discuss the limitations of this classical method in respect to detector performance, very short and long coherence lengths. Furthermore we demonstrate how a Ronchi grating setup [4] can be used to quickly establish if the beam is coherent over a large area.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. 050022
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1741
Keyword [en]
Synchrotron-Radiation, Diffraction
National Category
Accelerator Physics and Instrumentation
Identifiers
URN: urn:nbn:se:kth:diva-194052DOI: 10.1063/1.4952942ISI: 000383222800163Scopus ID: 2-s2.0-84984590205ISBN: 978-0-7354-1398-6 (print)OAI: oai:DiVA.org:kth-194052DiVA: diva2:1037596
Conference
12th International Conference on Synchrotron Radiation Instrumentation, SRI 2015, Marriott Marquis in Times SquareNew York, United States, 6 July 2015 through 10 July 2015
Note

QC 20161017

Available from: 2016-10-17 Created: 2016-10-14 Last updated: 2016-10-17Bibliographically approved

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