Characters of sagittal focusing monochrometor in high energy region
Abstract
A sagittal focusing monochromator will be used to monochromatize and focus the high energy photon radiated from an electron storage ring in 8 GeV class. The angle between an incident beam and crystal surface, which was given by the Bragg angle for symmetric reflection, and the Darwin width in X-ray dynamical theory were calculated for Si(111), Si(311), Si(333), Ge(111), Ge(311) and Ge(333) in a wide range of photon energy (10 similar to 100 keV). The difference between an incident angle and the Bragg angle increases further as the divergence of an incident beam increases in the geometry of sagittal focusing. We calculated the incident angle and compared it with the Bragg angle, and then investigated the scattering condition of a divergent beam for various geometries of sagittal focusing monochrometor by using the numerical results of the Darwin width.
- Publication:
-
Unknown
- Pub Date:
- February 1991
- Bibcode:
- 1991csfm.rept.....K
- Keywords:
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- Focusing;
- Monochromatic Radiation;
- Monochromators;
- Photons;
- Bragg Angle;
- Crystal Structure;
- Crystal Surfaces;
- Germanium;
- Silicon;
- Storage Rings (Particle Accelerators);
- Synchrotrons;
- X Rays;
- Nuclear and High-Energy Physics