Small-angle options of the upgraded ultrasmall-angle x-ray scattering beamline BW4 at HASYLAB

We present the upgrade and present status of the ultrasmall-angle x-ray scattering (USAXS) beamline BW4 at the Hamburg Synchrotronstrahlungslabor. In order to extend the accessible scattering vector range, new small-angle setups have been established, making use of the high flux and small divergence of BW4. In standard transmission geometry using a beam size of B=400x400 mu m(2) (horizontalxvertical), typical small-angle resolution ranges from d(max)=90 to 650 nm, depending on sample-to-detector distance. Additionally a new microfocus option has been established. This microfocus option allows reducing the sample size by one order of magnitude. Using parabolic beryllium compound refractive lenses, a new standard beam size of B=65x35 mu m(2) (horizontalxvertical) can be provided. The mu-SAXS resolution is as high as d(max)=150 nm. Using mu-SAXS in combination with grazing incidence (mu-GISAXS) on a standard noble metal gradient multilayer, we prove the feasibility of mu-GISAXS experiments at a second generation source. (c) 2006 American Institute of Physics.