Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 7: POSTER: INTERNAL SYMPOSIUM Scattering Experiments

CPP 7.2: Poster

Montag, 26. März 2007, 16:00–18:00, Poster B

Extending the possibilities of a Kratky-Compact-Camera by use of focussing multilayer X-ray optics — •Thomas Henze, Klaus Schröter, and Thomas Thurn-Albrecht — Martin-Luther-Universität Halle-Wittenberg, Institut für Physik, Polymerphysik

The use of focussing multilayer x-ray optics in laboratory x-ray equipment offers the potential of a substantial gain in primary beam intensity without a significant loss of resolution. We present the result of a refurbishment of Kratky-Compact-Camera, a classical setup for small angle x-ray scattering on isotropic samples, with an elliptically bent focussing multilayer. The advantages of the Kratky collimation system are ease of alignment, high intensity and low background. A further gain in intensity is highly desirable for time dependent experiments as well as for measurements of weakly scattering samples. The performance of the revised setup is analyzed quantitatively by comparing intensity and full width at half maximum of the primary beam, as well as the minimal accessible scattering vector with the corresponding parameters of the simple setup without optics. A gain in intensity of a factor of 2 up to 10 is achieved, depending on the details of the alignment. In addition the multilayer produces a monochromatic beam. First measurements on exemplary polymer systems are shown.