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

Abstract

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=400 × 400 μm2 (horizontal × vertical), typical small-angle resolution ranges from dmax=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=65 × 35 μm2 (horizontal × vertical) can be provided. The μ-SAXS resolution is as high as dmax = 150 nm. Using μ-SAXS in combination with grazing incidence (μ-GISAXS) on a standard noble metal gradient multilayer, we prove the feasibility of μ-GISAXS experiments at a second generation source. © 2006 American Institute of Physics.