Pfeiffer, F;
Bunk, O;
Schulze-Briese, C;
Diaz, A;
Weitkamp, T;
David, C;
vanderVeen, JF;
... Robinson, IK; + view all
(2005)
Shearing Interferometer for Quantifying the Coherence of Hard X-Ray Beams.
Physical Review Letters
, 94
(16)
, Article 164801. 10.1103/PhysRevLett.94.164801.
![[thumbnail of 9966.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview |
PDF
9966.pdf Download (1MB) |
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 m. 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.
| Type: | Article |
|---|---|
| Title: | Shearing Interferometer for Quantifying the Coherence of Hard X-Ray Beams |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.164801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.164801 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society. An important new method of measuring coherence on very small length scales, appropriate for X-rays. The Swiss authors made the measurements at the SLS facility. UCL author Robinson made contributions to the interpretation and presentation of the results. |
| Keywords: | Talbot effect, coherence function, synchrotron |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9966 |
Archive Staff Only
 |
View Item |
