Shearing interferometer for quantifying the coherence of hard x-ray beams

F. Pfeiffer; O. Bunk; C. Schulze-Briese; A. Diaz; T. Weitkamp; C. David; J. F. Van Der Veen; I. Vartanyants; I. K. Robinson

doi:10.1103/PhysRevLett.94.164801

Shearing interferometer for quantifying the coherence of hard x-ray beams

F. Pfeiffer, O. Bunk, C. Schulze-Briese, A. Diaz, T. Weitkamp, C. David, J. F. Van Der Veen, I. Vartanyants, I. K. Robinson

Research output: Contribution to journal › Article › peer-review

127 Scopus citations

Abstract

We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer consisting of a beam splitter phase grating and an analyzer amplitude grating has been used to measure the degree of coherence as a function of the beam separation out to 30 μm. Importantly, the technique provides a model-free and spatially resolved measurement of the complex coherence function and is not restricted to high resolution detectors and small fields of view. The spatial characterization of the wave front has important applications in discovering localized defects in beam line optics.

Original language	English
Article number	164801
Journal	Physical Review Letters
Volume	94
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.94.164801
State	Published - 29 Apr 2005
Externally published	Yes

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title = "Shearing interferometer for quantifying the coherence of hard x-ray beams",

abstract = "We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer consisting of a beam splitter phase grating and an analyzer amplitude grating has been used to measure the degree of coherence as a function of the beam separation out to 30 μm. Importantly, the technique provides a model-free and spatially resolved measurement of the complex coherence function and is not restricted to high resolution detectors and small fields of view. The spatial characterization of the wave front has important applications in discovering localized defects in beam line optics.",

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AU - Pfeiffer, F.

AU - Bunk, O.

AU - Schulze-Briese, C.

AU - Diaz, A.

AU - Weitkamp, T.

AU - David, C.

AU - Van Der Veen, J. F.

AU - Vartanyants, I.

AU - Robinson, I. K.

PY - 2005/4/29

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AB - We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer consisting of a beam splitter phase grating and an analyzer amplitude grating has been used to measure the degree of coherence as a function of the beam separation out to 30 μm. Importantly, the technique provides a model-free and spatially resolved measurement of the complex coherence function and is not restricted to high resolution detectors and small fields of view. The spatial characterization of the wave front has important applications in discovering localized defects in beam line optics.

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JO - Physical Review Letters

JF - Physical Review Letters

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Shearing interferometer for quantifying the coherence of hard x-ray beams

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