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Geometric scattering in prism-array lenses for hard x-rays: Measurements, simulations and models
KTH, School of Engineering Sciences (SCI), Physics, Medical Imaging.ORCID iD: 0000-0002-7725-0548
2012 (English)In: X-Ray Optics And Microanalysis, American Institute of Physics (AIP), 2012, Vol. 1437, 111-115 p.Conference paper, Published paper (Refereed)
Abstract [en]

This work investigates the properties of off-axis focusing of prism-array lenses. Raytracing simulations are in agreement with measurements on a planar silicon prism-array lens at 13.4 keV. The simulations show that refractions and reflections on the paraxial side of the prisms cause scattering. This geometric scattering is the main impacting factor when focusing sources that are off the optical axis. For low-attenuating materials it also limits the effective aperture on axis. A new analytical model that is able to predict the amount of scattering is presented. Such a model is for example useful when optimising optical systems, but also to understand the limits and possibilities prism-array lenses.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012. Vol. 1437, 111-115 p.
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1437
Keyword [en]
analytic model, Fresnel lens, kinoform lens, scattering, x-ray lens
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:kth:diva-100425DOI: 10.1063/1.3703353ISI: 000307636000020Scopus ID: 2-s2.0-84863630885ISBN: 978-073541027-5 (print)OAI: oai:DiVA.org:kth-100425DiVA: diva2:543614
Conference
21st International Congress on X-Ray Optics and Microanalysis, ICXOM21; Campinas; 5 September 2011 through 9 September 2011
Note

QC 20120809

Available from: 2012-08-09 Created: 2012-08-08 Last updated: 2013-09-16Bibliographically approved

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Nillius, Peter

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