Mapping misoriented fibers using X-ray dark field tomography

Torsten Lauridsen; Robert Krarup Feidenhans'l; Erik Mejdal Lauridsen

doi:10.1007/s00339-014-8398-z

Mapping misoriented fibers using X-ray dark field tomography

Torsten Lauridsen, Robert Krarup Feidenhans'l, Erik Mejdal Lauridsen

5 Citationer (Scopus)

Abstract

X-ray grating interferometers produce three distinct signals; an absorption signal, a differential phase signal and a dark field signal. Until now a method for successfully creating dark field tomograms of nonisotropic samples has not been demonstrated. In this paper we test a method for creating such tomograms on a highly nonisotropic sample, i.e. a five layer "sandwich" of oriented carbon fibers. The fibers are parallel within the individual sandwich layers, but perpendicular to the fibers in the adjacent layers. We show that by choosing a rotation axis parallel to the grating stepping direction (i.e. a horizontal rotation axis in most setup configurations) it is possible to produce a darkfield tomogram where fibers parallel to the probed scattering direction appear to have no dark field signal. The method produces a tomogram in the form of a scalar field of dark field scattering values.

Originalsprog	Engelsk
Tidsskrift	Applied Physics A: Materials Science & Processing
Vol/bind	115
Udgave nummer	3
Sider (fra-til)	741-745
ISSN	0947-8396
DOI	https://doi.org/10.1007/s00339-014-8398-z
Status	Udgivet - 1 jun. 2014

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10.1007/s00339-014-8398-z

Citationsformater

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abstract = "X-ray grating interferometers produce three distinct signals; an absorption signal, a differential phase signal and a dark field signal. Until now a method for successfully creating dark field tomograms of nonisotropic samples has not been demonstrated. In this paper we test a method for creating such tomograms on a highly nonisotropic sample, i.e. a five layer {"}sandwich{"} of oriented carbon fibers. The fibers are parallel within the individual sandwich layers, but perpendicular to the fibers in the adjacent layers. We show that by choosing a rotation axis parallel to the grating stepping direction (i.e. a horizontal rotation axis in most setup configurations) it is possible to produce a darkfield tomogram where fibers parallel to the probed scattering direction appear to have no dark field signal. The method produces a tomogram in the form of a scalar field of dark field scattering values.",

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T1 - Mapping misoriented fibers using X-ray dark field tomography

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AU - Feidenhans'l, Robert Krarup

AU - Lauridsen, Erik Mejdal

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Y1 - 2014/6/1

N2 - X-ray grating interferometers produce three distinct signals; an absorption signal, a differential phase signal and a dark field signal. Until now a method for successfully creating dark field tomograms of nonisotropic samples has not been demonstrated. In this paper we test a method for creating such tomograms on a highly nonisotropic sample, i.e. a five layer "sandwich" of oriented carbon fibers. The fibers are parallel within the individual sandwich layers, but perpendicular to the fibers in the adjacent layers. We show that by choosing a rotation axis parallel to the grating stepping direction (i.e. a horizontal rotation axis in most setup configurations) it is possible to produce a darkfield tomogram where fibers parallel to the probed scattering direction appear to have no dark field signal. The method produces a tomogram in the form of a scalar field of dark field scattering values.

AB - X-ray grating interferometers produce three distinct signals; an absorption signal, a differential phase signal and a dark field signal. Until now a method for successfully creating dark field tomograms of nonisotropic samples has not been demonstrated. In this paper we test a method for creating such tomograms on a highly nonisotropic sample, i.e. a five layer "sandwich" of oriented carbon fibers. The fibers are parallel within the individual sandwich layers, but perpendicular to the fibers in the adjacent layers. We show that by choosing a rotation axis parallel to the grating stepping direction (i.e. a horizontal rotation axis in most setup configurations) it is possible to produce a darkfield tomogram where fibers parallel to the probed scattering direction appear to have no dark field signal. The method produces a tomogram in the form of a scalar field of dark field scattering values.

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DO - 10.1007/s00339-014-8398-z

M3 - Journal article

SN - 0947-8396

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SP - 741

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JO - Applied Physics A: Materials Science & Processing

JF - Applied Physics A: Materials Science & Processing

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ER -

Mapping misoriented fibers using X-ray dark field tomography

Abstract

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