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Title: Efficiency and coherence preservation studies of Be refractive lenses for XFELO application

Abstract

Performance tests of parabolic beryllium refractive lenses, considered as X-ray focusing elements in the future X-ray free-electron laser oscillator (XFELO), are reported. Single and double refractive lenses were subject to X-ray tests, which included: surface profile, transmissivity measurements, imaging capabilities and wavefront distortion with grating interferometry. Optical metrology revealed that surface profiles were close to the design specification in terms of the figure and roughness. The transmissivity of the lenses is >94% at 8 keV and >98% at 14.4 and 18 keV. These values are close to the theoretical values of ideal lenses. Images of the bending-magnet source obtained with the lenses were close to the expected ones and did not show any significant distortion. Grating interferometry revealed that the possible wavefront distortions produced by surface and bulk lens imperfections were on the level of ~λ/60 for 8 keV photons. Thus the Be lenses can be succesfully used as focusing and beam collimating elements in the XFELO.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1426776
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 25; Journal Issue: 2; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; refractive lenses; x-ray focusing; x-ray optics; x-rays

Citation Formats

Kolodziej, Tomasz, Stoupin, Stanislav, Grizolli, Walan, Krzywinski, Jacek, Shi, Xianbo, Kim, Kwang-Je, Qian, Jun, Assoufid, Lahsen, and Shvyd'ko, Yuri. Efficiency and coherence preservation studies of Be refractive lenses for XFELO application. United States: N. p., 2018. Web. doi:10.1107/S160057751701699X.
Kolodziej, Tomasz, Stoupin, Stanislav, Grizolli, Walan, Krzywinski, Jacek, Shi, Xianbo, Kim, Kwang-Je, Qian, Jun, Assoufid, Lahsen, & Shvyd'ko, Yuri. Efficiency and coherence preservation studies of Be refractive lenses for XFELO application. United States. doi:10.1107/S160057751701699X.
Kolodziej, Tomasz, Stoupin, Stanislav, Grizolli, Walan, Krzywinski, Jacek, Shi, Xianbo, Kim, Kwang-Je, Qian, Jun, Assoufid, Lahsen, and Shvyd'ko, Yuri. Wed . "Efficiency and coherence preservation studies of Be refractive lenses for XFELO application". United States. doi:10.1107/S160057751701699X. https://www.osti.gov/servlets/purl/1426776.
@article{osti_1426776,
title = {Efficiency and coherence preservation studies of Be refractive lenses for XFELO application},
author = {Kolodziej, Tomasz and Stoupin, Stanislav and Grizolli, Walan and Krzywinski, Jacek and Shi, Xianbo and Kim, Kwang-Je and Qian, Jun and Assoufid, Lahsen and Shvyd'ko, Yuri},
abstractNote = {Performance tests of parabolic beryllium refractive lenses, considered as X-ray focusing elements in the future X-ray free-electron laser oscillator (XFELO), are reported. Single and double refractive lenses were subject to X-ray tests, which included: surface profile, transmissivity measurements, imaging capabilities and wavefront distortion with grating interferometry. Optical metrology revealed that surface profiles were close to the design specification in terms of the figure and roughness. The transmissivity of the lenses is >94% at 8 keV and >98% at 14.4 and 18 keV. These values are close to the theoretical values of ideal lenses. Images of the bending-magnet source obtained with the lenses were close to the expected ones and did not show any significant distortion. Grating interferometry revealed that the possible wavefront distortions produced by surface and bulk lens imperfections were on the level of ~λ/60 for 8 keV photons. Thus the Be lenses can be succesfully used as focusing and beam collimating elements in the XFELO.},
doi = {10.1107/S160057751701699X},
journal = {Journal of Synchrotron Radiation (Online)},
number = 2,
volume = 25,
place = {United States},
year = {2018},
month = {2}
}

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Figures / Tables:

Figure 1 Figure 1: (a) Schematic drawing of the biconcave parabolic Be lens. Photographs of the inspected lenses: (b) Lens #1 (R = 100 μm), face 1. (c) Lens #2 (R = 100 μm), face 2. (d) Lens #3 (R = 50 μm), face 1. Small indentations in the center of themore » beryllium foils are the actual lenses. The total diameter of the lens with the mounting disk is 12 mm. See text for details.« less

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