Focal Spot and Wavefront Sensing of an X-Ray Free Electron laser using Ronchi shearing interferometry

Year: 2017

Type: article

Abstract: The Linac Coherent Light Source (LCLS) is an X-ray source of unmatched brilliance, that is advancing many scientific fields at a rapid pace. The highest peak intensities that are routinely produced at LCLS take place at the Coherent X-ray Imaging (CXI) instrument, which can produce spotsize at the order of 100 nm, and such spotsizes and intensities are crucial for experiments ranging from coherent diffractive imaging, non-linear x-ray optics and high field physics, and single molecule imaging. Nevertheless, a full characterisation of this beam has up to now not been performed. In this paper we for the first time characterise this nanofocused beam in both phase and intensity using a Ronchi Shearing Interferometric technique. The method is fast, in-situ, uses a straightforward optimization algoritm, and is insensitive to spatial jitter.

Source: Scientific Reports

DOI: 10.1038/s41598-017-13710-8

Authors: Bob Nagler, Andrew Aquila, Sébastien Boutet, Eric C. Galtier, Akel Hashim, Mark S. Hunter, Mengning Liang, Anne E. Sakdinawat, Christian G. Schroer, Andreas Schropp, Matthew H. Seaberg, Frank Seiboth, Tim van Driel, Zhou Xing, Yanwei Liu, Hae Ja Lee

Institutions: SLAC National Accelerator Laboratory, Universität Hamburg, Deutsches Elektronen-Synchrotron DESY

Language: English

Topic: Advanced X-ray Imaging Techniques

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: U.S. Department of Energy, Deutsche Forschungsgemeinschaft, Volkswagen Foundation, Bundesministerium für Bildung und Forschung, Ministerio de Economía y Competitividad, Office of Science, Basic Energy Sciences, Fusion Energy Sciences, SLAC National Accelerator Laboratory

OpenAlex ID: W2766179173