Logarithmic-spiral focusing monochromator
- 1 May 1976
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 47 (5) , 545-547
- https://doi.org/10.1063/1.1134687
Abstract
A crystal monochromator with a logarithmic‐spiral curvature has been designed as part of a low‐angle x‐ray diffraction camera that uses synchrotron radiation emanating from the storage ring SPEAR at Stanford Linear Accelerator Center. The logarithmic‐spiral curvature allows a greater demagnification of the source than is permitted by a cylindrical geometry. Independent bending couples are applied at both ends of a rectangular crystal plate via pairs of parallel rods which rotate under a linear push from differential micrometer screws. Stepping motors control the bending mechanism, theta motion, guard slits, and camera alignment. A tenfold demagnification of the source is readily obtained. Focusing is rapid and easy. The crystal monochromator is combined with a focusing mirror in order to eliminate harmonics and produce a point focus (Webb, Samson, Stroud, Gamble, and Baldeschwieler, 1975).Keywords
This publication has 4 references indexed in Scilit:
- Developments in optically focusing reflectors for small-angle X-ray scattering camerasJournal of Applied Crystallography, 1974
- Focusing monochromatorsActa Crystallographica Section A, 1969
- Some developments and applications of microfocus X-ray diffraction techniquesBritish Journal of Applied Physics, 1958
- An adjustable curved crystal monochromator for X-ray diffraction analysisApplied Scientific Research, Section B, 1950