Dresden 2009 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 35: Poster Session II

MM 35.9: Poster

Mittwoch, 25. März 2009, 16:30–18:30, P4

New detectors improve the performance of ASAXS beamline B1 at HASYLAB, DESY — •Ulla Vainio, Tom Schubert, Michael Lohmann, Stephan Botta, Thorsten Kracht, and Rainer Gehrke — HASYLAB at DESY, Notkestr. 85, D-22607 Hamburg, Germany

B1 at the DORIS synchrotron at DESY is one of the first anomalous small-angle x-ray scattering (ASAXS) beamlines. Several upgrades will make the beamline again competitive. During 2008 many improvements have been made to the beamline: A new, thicker Si (311) monochromator crystal is now used. A cooling system for the first monochromator crystal was designed and applied. Better alignment of the whole beamline was made, so a smaller beamstop for the primary beam can be used. Automated sample heating programs were implemented to the measurement program, allowing in situ measurements. A PILATUS 100k detector was tested at the beamline. It was shown that PILATUS has at 11 000 eV about ten times better efficiency and much better resolution than the old 2D gas detector. ASAXS measurements showed very good quality. In 2009 the PILATUS detector and a new system allowing for simultaneous SAXS and wide-angle x-ray scattering (WAXS) measurements will be available. A 1D MYTHEN detector can be used as a WAXS detector. All the improvements combined with new Matlab based data processing tools developed 2007 and 2008 allows for speedy and easy SAXS, WAXS and ASAXS measurements that can be analysed on site right after the measurement of the sample.