Bio SAXS Beamline

The described scientific case of the BioSAXS beamline stands for a high brilliance X-ray beam with low scattering background and energy tunability for anomalous SAXS experiments on biological relevant metals such as Calcium up to Molybdenum. The position of the beamline on a straight section of a 2m canted undulator permits the different modes of operation. With focusing abilities down to several μm using Kirk Patrick-Baez optics and alternatively refractive Beryllium lenses SAXS experiments in nano-liter volumes will be possible. Stray radiation will be eliminated by several sets of silts to facilitate a low intrinsic background of the beamline.

The end station will be equipped with highly automated and miniaturized sample environments for high throughput applications. Cryo-cooled sample holders and continues flow-through micro capillaries are constructed to reduce radiation damage by the high flux X-ray beam provided by PETRA-III.

Contact

Manfred Roessle
Project Leader
Tel: +49 (0) 40 89902-192
Email: manfred.roessle@embl-hamburg.de

Proposed Experimental Capabilities

• Double single crystal monochromator (DCM) mode.
  The DCM mode will be used as standard and allows SAXS experiments in small volumes with a good energy resolution. Also ASAXS will be performed in this configuration
• Multilayer monochromator (MLM) mode
  The high flux of this mode permits time-resolved experiments down to the sub-microsecond level.
• "Pink beam" mode
  The use of the raw spectrum of the undulator can be used for ultra high flux experiments such as "few particle" scattering in highly diluted systems. In addition the coherence properties of the X-ray beam can be used.