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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 5 — Feb. 10, 2004
  • pp: 1024–1037

SU5: a calibrated variable-polarization synchrotron radiation beam line in the vacuum-ultraviolet range

Laurent Nahon and Christian Alcaraz  »View Author Affiliations


Applied Optics, Vol. 43, Issue 5, pp. 1024-1037 (2004)
http://dx.doi.org/10.1364/AO.43.001024


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Abstract

SU5 is a high-resolution variable-polarization synchrotron radiation (SR) beam line with which linear and circular dichroism experiments are performed in the vacuum ultraviolet (VUV) range (5–40 eV), based on an electromagnetic crossed undulator called the Onduleur Plan/Helicoïdal du Lure à Induction Electromagnétique (OPHELIE). To get precise knowledge of the polarization state of the emitted SR and to take into account the polarization transformations induced by reflection on the various optics, we set up an in situ VUV polarimeter to provide a precise and complete polarization analysis of the SR at the sample location. The overall measured polarization performances were highly satisfactory, with measured linear polarization rates of more than 98% (83%) in the vertical (horizontal) linear polarization mode and an average 92.1% (95.2%) circular polarization rate for the right- (left)-handed circular polarization mode, which, to our knowledge, are the highest reported values in the VUV range. Despite some uneven photon energy efficiency, the OPHELIE crossed undulator behaves as expected in terms of polarization, permitting full control of the emitted polarization by manipulation of the vertical-to-horizontal magnetic field ratio (ρund) and the relative longitudinal phase (ϕund).

© 2004 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(120.5700) Instrumentation, measurement, and metrology : Reflection
(230.6080) Optical devices : Sources
(300.6540) Spectroscopy : Spectroscopy, ultraviolet
(340.6720) X-ray optics : Synchrotron radiation

History
Original Manuscript: July 29, 2003
Revised Manuscript: October 22, 2003
Published: February 10, 2004

Citation
Laurent Nahon and Christian Alcaraz, "SU5: a calibrated variable-polarization synchrotron radiation beam line in the vacuum-ultraviolet range," Appl. Opt. 43, 1024-1037 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-5-1024

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