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Proceedings Paper

Hartmann wavefront sensor in the EUV and hard X-ray range for source metrology and beamline optimization (Conference Presentation)
Author(s): Ombeline de La Rochefoucauld; Samuel Bucourt; Daniele Cocco; Guillaume Dovillaire; Fabrice Harms; Mourad Idir; Dietmar Korn; Xavier Levecq; Martin Piponnier; Rakchanok Rungsawang; Philippe Zeitoun

Paper Abstract

Emergence of ultrafast EUV to X-ray sources, Free Electron Laser, High harmonic generation, betatron and Compton, has opened new paradigms in physical, chemical, biological and medical sciences by either producing ultrahigh intensities or for ultrafast imaging or by enabling pump-probe experiments at new timescales. Most of these experiments require an excellent or at least a properly defined wavefront (WF). A number of WF sensing techniques have been proposed in the X-Rays, including grating-based interferometry, speckle tracking, pencil beam deflectometry, or curvature sensors. Among these techniques, Hartmann WF sensing demonstrated a number of advantages, such as insensitivity to vibrations, achromaticity and very large dynamic range. Furthermore, the phase and intensity maps are directly retrieve and nearly instantaneously without the use of complex and long algorithms. Imagine Optic developed EUV to X-ray WF sensors since more than 15 years taking benefit of decades of experience in the visible range. We will show several experiments using our EUV sensors for metrology and optimization of ultrafast EUV sources. We recently developed a Hartmann sensor in the 5 - 25keV range. The device is based on a custom scintillator-to-detector optical relay system, as well as on an optimal Hartmann array geometry, providing 20µm spatial WF sampling resolution, over a 3x3 mm² pupil. We show the results of first experiments on a synchrotron beamline at 10 keV, achieving 4pm WF repeatability.

Paper Details

Date Published: 14 May 2019
Proc. SPIE 11036, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III, 110360P (14 May 2019); doi: 10.1117/12.2522521
Show Author Affiliations
Ombeline de La Rochefoucauld, Imagine Optic SA (France)
Samuel Bucourt, Imagine Optic SA (France)
Daniele Cocco, SLAC National Accelerator Lab. (United States)
Guillaume Dovillaire, Imagine Optic SA (France)
Fabrice Harms, Imagine Optic SA (France)
Mourad Idir, Brookhaven National Lab. (United States)
National Synchrotron Light Source II (United States)
Dietmar Korn, Imagine Optic SA (France)
Xavier Levecq, Imagine Optic SA (France)
Martin Piponnier, Imagine Optic SA (France)
Rakchanok Rungsawang, Imagine Optic SA (France)
Philippe Zeitoun, Lab. d’Optique Appliquée, Ecole Nationale Supérieure de Techniques Avancées (France)
CNRS (France)
Ecole Polytechnique (France)

Published in SPIE Proceedings Vol. 11036:
Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources III
Dino A. Jaroszynski; MinSup Hur, Editor(s)

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