3. Proposal for an integrated life science SR ... - EMBL Hamburg

3.2.2. Proposal
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Proposal by EMBL-Hamburg
for an Integrated Life Science Centre at PETRA-III
The proposed BioSAXS beamline will be built in the framework of the general EMBL concept
of life science applications at PETRA-III. The modular design of the proposed BioSAXS
beamline will facilitate the straightforward switching between different modes of operation
(Figure 5):
Canted* 1
undulator
Primary Slit
System with
white beam
monitor
Fixed exit* 2
Si (111)
double monochromator
Optional :
Multilayer
monochromator
Slit System
with beam
monitor
KB focusing
mirror system* 3 * 4
Beam
monitor
* 1 X-ray beam originating from 2 nd undulator is separated by 5 mrad
*2 Offset is 30 mm.
*3 Option for pink beam: N2 cooled vertically focusing mirror
* 4 Option for supplementary X-ray refractive lenses
Figure 5: Schematic design of the SAXS beamline for biological applications.
• High-precision scattering experiments using the high energy resolution of a double
crystal monochromator system, with its ability to tune the energy in a large energy range
from 4 to 20 keV (Δλ/λ = 1 x 10 -4 and 2 x 10 13 ph/s at 8 keV);
• Increased flux with a lower energy resolution of a multi-layer monochromator system for
fast kinetic experiments (Δλ/λ=1 x 10 -2 and 3 x 10 15 ph/s at 8 keV);
Slit
Systems
with beam
monitors
WAXS/SAXS
detectors (in
focus) with
beam monitor
Sample
Front end Optical hutch
Experimental
hutch