X-ray phase plate for energy-dispersive and mononchromatic experiments

Carlos M. Giles; Cecile Malgrange; Jose Goulon; Christian Vettier; Francois de Bergevin; Andreas K. Freund; Pascal Elleaume; E. Dartyge; Alain Fontaine; C. Giorgetti; S. Pizzini

doi:10.1117/12.168573

15 February 1994 X-ray phase plate for energy-dispersive and mononchromatic experiments

Carlos M. Giles, Cecile Malgrange, Jose Goulon, Christian Vettier, Francois de Bergevin, Andreas K. Freund, Pascal Elleaume, E. Dartyge, Alain Fontaine, C. Giorgetti, S. Pizzini

Author Affiliations +

Proceedings Volume 2010, X-Ray and Ultraviolet Polarimetry; (1994) https://doi.org/10.1117/12.168573
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Diamond crystals are excellent phase plates for the forward diffracted X-rays in the Bragg geometry. The phase-shift between the (sigma) and (pi) components of the transmitted wave varies with the incident angular offset from the center of the reflection profile and can be adjusted to any desired value. Due to the low absorption coefficient of diamond, rather thick crystals (about 1 mm thick) can be used and operated in a region where the variation of the phase-shift with the angle of incidence is not too strong. This property was exploited to obtain a high degree of circular polarization in an energy dispersive absorption spectrometer at LURE (Orsay) where the source is rather broad.

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Carlos M. Giles, Cecile Malgrange, Jose Goulon, Christian Vettier, Francois de Bergevin, Andreas K. Freund, Pascal Elleaume, E. Dartyge, Alain Fontaine, C. Giorgetti, and S. Pizzini "X-ray phase plate for energy-dispersive and mononchromatic experiments", Proc. SPIE 2010, X-Ray and Ultraviolet Polarimetry, (15 February 1994); https://doi.org/10.1117/12.168573

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