Webb, N. G. and Samson, S. and Stroud, R. M. and Gamble, R. C. and Baldeschwieler, J. D. (1976) Remotely controlled mirror of variable geometry for small angle x-ray diffraction with synchrotron radiation. Review of Scientific Instruments, 47 (7). pp. 836-839. ISSN 0034-6748. http://resolver.caltech.edu/CaltechAUTHORS:20120802-145502429
- Published Version
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20120802-145502429
A total-reflecting mirror of 120-cm length was designed and built to focus synchrotron radiation emanating from the electron-positron storage ring at the Stanford Linear Accelerator Center (SPEAR). The reflecting surface is of unpolished float glass. The bending and tilt mechanism allows very fine control of the curvature and selectability of the critical angle for wavelengths ranging from 0.5 to 3.0 Å. Elliptical curvature is used to minimize aberrations. The mirror is placed asymmetrically onto the ellipse so as to achieve a tenfold demagnification of the source. The bending mechanism reduces nonelastic deformation (flow) and minimizes strains and stresses in the glass despite its length. Special design features assure stability of the focused image. The mirror reduces the intensity of shorter wavelength harmonics by a factor of approximately 100.
|Additional Information:||© 1976 American Institute of Physics. Received 15 January 1976; in final form, 19 March 1976. We are grateful to I. Matsubara of the University of Tokyo for collaboration, to S. Doniach and D. Maurice for support and facilities at Stanford, and especially to H. Winick, A. Golde, and B. Salzburg at Stanford Synchrotron Radiation Project, and to G. Warren and R. Nelson at SLAC. We thank Libbey-Owens-Ford for contributing thirty pieces of float glass, direct from the production line, from which the mirror was selected. We acknowledge help and advice from members of the European synchrotron radiation projects, including J. Witz, U. Arndt, A. Franks, G. Rosenbaum, and M. H. F. Wilkins. Contribution No. 5252 from the Division of Chemistry and Chemical Engineering, California Institute of Technology. This work was supported by the National Science Foundation under Grants Nos. GP-38855X-2, GH-39525, the National Institutes of Health, under Grants Nos. 21111-3 and GM-70469, the U .S.-Japan Cooperative Science Program, and the U.K. Science Research Council. Part of the support was also given by the National Science Foundation Grant No. DMR73-07692 A02. in cooperation with the Stanford Linear Accelerator Center and the Energy Research and Development Administration. National Institutes of Health Postdoctoral Fellowship.|
|Other Numbering System:|
|Classification Code:||PACS: 07.85.-m; 06.60.-c|
|Official Citation:||Remotely controlled mirror of variable geometry for small-angle x-ray diffraction with synchrotron radiation N. G. Webb, S. Samson, R. M. Stroud, R. C. Gamble, and J. D. Baldeschwieler, Rev. Sci. Instrum. 47, 836 (1976), DOI:10.1063/1.1134749|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Aucoeur Ngo|
|Deposited On:||02 Aug 2012 22:20|
|Last Modified:||26 Dec 2012 15:48|
Repository Staff Only: item control page