Open AccessTransmission‐type X‐ray linear polarizer with perfect crystals
Author(s) -
Hasegawa Y.,
Ueji Y.,
Okitsu K.,
Ablett J. M.,
Siddons D. P.,
Amemiya Y.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597019560
Subject(s) - polarizer , optics , polarization (electrochemistry) , linear polarization , beam (structure) , bragg's law , materials science , transmission (telecommunications) , reflection (computer programming) , polarizing filter , physics , optical filter , diffraction , birefringence , chemistry , telecommunications , laser , computer science , programming language
Even though conventional X‐ray polarizers with multiple‐reflection channel‐cut structures perform well, they suffer from the disadvantage that the polarized beam is non‐stationary as the energy is scanned. In this paper the possibility of using a thin Bragg reflector as a polarizing filter is investigated, so that the transmitted beam (rather than the Bragg‐reflected beam) is used. Consequently, the position and direction of the transmitted beam are unchanged as the energy is changed, or even when the polarization direction to be filtered out is changed. Theoretical considerations as well as experimental results on the performance characteristics of the proposed transmission‐type X‐ray linear polarizer are presented. A polarization ratio, defined as I H / I V , higher than 10 5 was obtained.