| Title |
Two-Dimensional Beam Size Measurements with X-Ray Heterodyne Near Field Speckles |
| Authors |
- M. Siano, L. Teruzzi
Università degli Studi di Milano, Milano, Italy
- D. Butti, A. Goetz, T. Lefèvre, S. Mazzoni, G. Trad
CERN, Meyrin, Switzerland
- U. Iriso, A.A. Nosych, E. Solano, L. Torino
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
- B. Paroli, M.A.C. Potenza
Universita’ degli Studi di Milano & INFN, Milano, Italy
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| Abstract |
We report on 2D beam size measurements with a novel interferometric technique named Heterodyne Near Field Speckles, capable of resolving few-micrometer beam sizes. It relies on the interference between the weak spherical waves scattered by a colloidal suspension and the intense transilluminating X-ray beam. Fourier analysis of the resulting speckles enables full 2D coherence mapping of the incoming radiation, from which the beam sizes along the two orthogonal directions are retrieved. We show experimental results obtained with 12.4 keV X-rays at the NCD-SWEET undulator beamline at ALBA, where the vertical beam size has been changed between 5 and 15 micrometers by varying the beam coupling. The results agree well with the estimated beam sizes from the pinhole calculations. Finally, we discuss recent investigations on alternative targets aimed at improving the signal-to-noise ratio of the technique.
|
| Paper |
download TUOA06.PDF [1.194 MB / 4 pages] |
| Slides |
download TUOA06_TALK.PDF [1.193 MB] |
| Export |
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| Conference |
IBIC2021 |
| Series |
International Beam Instrumentation Conference (10th) |
| Location |
Pohang, Rep. of Korea |
| Date |
24-28 May 2021 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Changbum Kim (PAL, Pohang, Rep. of Korea); Volker R. W. Schaa (GSI, Darmstadt, Germany); Dong-Eon Kim (PAL, Pohang, Rep. of Korea); Jaeyu Lee (PAL, Pohang, Rep. of Korea) |
| Online ISBN |
978-3-95450-230-1 |
| Online ISSN |
2673-5350 |
| Received |
03 September 2021 |
| Accepted |
17 October 2021 |
| Issue Date |
12 November 2021 |
| DOI |
doi:10.18429/JACoW-IBIC2021-TUOA06 |
| Pages |
176-179 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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