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Transmission-type X-ray linear polarizer with perfect crystals
1Engineering Research Institute, The University of Tokyo, Yayoi, Bunkyo, Tokyo 113, Japan.
Journal of Synchrotron Radiation
|July 21, 2004
Summary
This study introduces a novel transmission-type X-ray linear polarizer using a thin Bragg reflector. This new design offers a stationary polarized beam, overcoming limitations of conventional X-ray polarizers.
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- Conventional X-ray polarizers utilize multiple-reflection channel-cut structures.
- These conventional polarizers exhibit a non-stationary polarized beam during energy scanning.
Purpose of the Study:
- To investigate the use of a thin Bragg reflector as a polarizing filter for X-rays.
- To develop a transmission-type X-ray linear polarizer with a stationary beam.
Main Methods:
- Theoretical analysis of Bragg reflector behavior for X-ray polarization.
- Experimental characterization of the transmission-type X-ray linear polarizer's performance.
Main Results:
- The proposed design uses the transmitted beam, ensuring beam stability.
- The position and direction of the transmitted beam remain constant with energy or polarization changes.
- A high polarization ratio (I(H)/I(V)) exceeding 10^5 was achieved.
Conclusions:
- A thin Bragg reflector can function effectively as a transmission-type X-ray linear polarizer.
- The developed polarizer offers superior stability compared to conventional designs.
- This technology enables more reliable X-ray polarization experiments.