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A silicon phase retarder for producing circularly polarized x-rays in the 2.1-3 keV energy range
Ist Teil von
Applied physics letters, 2012-01, Vol.101 (6)
Erscheinungsjahr
2012
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Circularly polarized synchrotron light is routinely used to study different material properties but is difficult to generate reproducibly below 3.1 keV. We present data from a 5 mu m Si phase retarder (PR) designed to operate in the 2.1 to 3 keV energy range. Measurements were performed at the Pd L3 edge to enable direct comparison with a conventional diamond PR. The degree of circular polarization was ascertained indirectly by recording the resonant specular reflectivity from a [Fe(2 ML)/Pd(15 ML)]20 multilayer. Our findings show that such a device can be used to extend the usable energy capability of PR technology down to 2.1 keV.