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Complete polarization analysis in the 1keV to 2keV energy range using a high-precision polarimeter

DOI: 10.1088/1742-6596/425/15/152014 DOI Help

Authors: Hongchang Wang (Diamond Light Source) , Sarnjeet Dhesi (Diamond Light Source) , Peter Bencok (Diamond Light Source) , Paul Steadman (Diamond Light Source) , Francesco Maccherozzi (Diamond Light Source) , Kawal Sawhney (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Conference Series , VOL 425

State: Published (Approved)
Published: March 2013

Abstract: The Beryl and YB66 crystals are proved to be suitable as analyzers in the energy range from 1.0keV to 2.0keV. The s-component reflectivity (Rs) of Beryl crystal reaches up to 10% with polarizing power Rs/Rp over 1000 at 1.1keV. The free-standing W/B4C multilayer has the phase shift over 5 degrees with moderate transmission up to 1.7keV. The Bragg resonance width of the Beryl crystal is only 350 microradians at 1.1keV, and the incidence angle of the beam onto the crystal needs to be constant within 50 microradians or better. A high-precision polarimeter was used for the polarimetry experiment, and the complete polarization analysis of the APPLE II undulator at 1.1 keV and 1.56keV will be presented.

Journal Keywords: Accuracy; Beryl; Crystals; Incidence Angle; Kev Range 01-10; Layers; Phase Shift; Polarimeters; Polarimetry; Polarization; Reflectivity; Wiggler Magnets

Subject Areas: Technique Development

Instruments: I06-Nanoscience , I10-Beamline for Advanced Dichroism