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- Title
Polarization control of an X-ray free-electron laser with a diamond phase retarder.
- Authors
Motohiro Suzuki; Yuichi Inubushi; Makina Yabashi; Tetsuya Ishikawa
- Abstract
A diamond phase retarder was applied to control the polarization states of a hard X-ray free-electron laser (XFEL) in the photon energy range 5-20 keV. The horizontal polarization of the XFEL beam generated from the planar undulators of the SPring-8 Angstrom Compact Free-Electron Laser (SACLA) was converted into vertical or circular polarization of either helicity by adjusting the angular offset of the diamond crystal from the exact Bragg condition. Using a 1.5 mm-thick crystal, a high degree of circular polarization, 97%, was obtained for 11.56 keV monochromatic X-rays, whereas the degree of vertical polarization was 67%, both of which agreed with the estimations including the energy bandwidth of the Si 111 beamline monochromator.
- Subjects
X-ray reflection; CATHODE rays; VACUUM tubes; ELECTROMAGNETIC waves; RADIOGRAPHY
- Publication
Journal of Synchrotron Radiation, 2014, Vol 21, Issue 3, p466
- ISSN
0909-0495
- Publication type
Article
- DOI
10.1107/S1600577514004780