DEVELOPMENT AND APPLICATIONS OF MICROBEAM SMALL-ANGLE SCATTERING USING SYNCHROTRON RADIATION. Christian Riekel, ESRF, B.P.220, F-38043 Grenoble Cedex.

The brilliance of third generation synchrotron sources -such as ESRF, APS or Spring-8- allows new approaches in the development of microbeam small-angle X-ray scattering cameras. Such cameras are particularly of interest for scanning SAXS-applications. Bent monochromator/bent mirror optics has allowed to reach a line focus at the sample position of =150(h)*15(v) um² at 0.09 nm for a flux of about 10¹⁰ photons/sec[l]. A symmetric beam size of 2-3 um diameter can be obtained by Bragg-Fresnel[2] or glass-capillary optics[3]. The status of both types of optics for low-angle experiments is discussed and exemplified by selected experiments in materials research.

[1] C. Riekel, P. Bosecke, O. Diat, M. Lorenzen, M. Sanchez del Rio and I. Snigireva, Rev. of Scientific Instruments, 66(2), 987(1995)

[2] A. Snigirev, I. Snigireva, C. Riekel, A. Miller, L. Wess, T. Wess, Journal de Physique, 3, C8, 443(1994)

[3] P. Engstrom and C. Riekel, J. Synchr. Rad., in press