A silicon %26lt; 111 %26gt; phase retarder for producing circularly polarized x-rays in the 2.1-3 keV energy range

作者：Bouchenoire Laurence^*; Morris Richard J H; Hase Thomas P A

来源：Applied Physics Letters, 2012, 101(6): 064107.

DOI：10.1063/1.4740080

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 %26lt; 111 %26gt; phase retarder (PR) designed to operate in the 2.1 to 3 keV energy range. Measurements were performed at the Pd L-3 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)](x20) 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.

• 出版日期2012-8-6