Method based on atomic photoionization for spot-size measurement on focused soft x-ray free-electron laser beams
- 27 November 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 89 (22)
- https://doi.org/10.1063/1.2397561
Abstract
A method has been developed and applied to measure the beam waist and spot size of a focused soft x-ray beam at the free-electron laser FLASH of the Deutsches Elektronen-Synchrotron in Hamburg. The method is based on a saturation effect upon atomic photoionization and represents an indestructible tool for the characterization of powerful beams of ionizing electromagnetic radiation. At the microfocus beamline BL2 at FLASH, a full width at half maximum focus diameter of (15±2)μm was determined.Keywords
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