We designed and regulary upgrading an home made SAXS experiment for high sensitivity measurements.
The generator is a copper rotating anode Rigaku RUH3R, with a fine focus filament.
Optic is composed by an Xenocs collimating multilayer mirror, coupled with home made hybrid cristal slits.
The distance between source and sample is around 200 cm. We take attention to reduce the air quantities between the sample and the vacuum chamber. In this way we designed an retractable nose, let us change the sample environment. We can propose multi-position capillary holder, powder holder, heating system, thermostated system, circulation chamber,...
The beam size on the sample is 0.8 mm x 0.8 mm and the flux around 100x106 ph/s.
The vacuum chamber is containing a beamstop with a small calibrated photodiode.
Distance between the detector is 120 cm, and the q range is from less to 10-2 Å-1 to 0.7 Å-1.
We use a Mar 300, automatic image plate reader, that produce a good resolution (0.150 mm), a good sensitivity (efficienty around 90%), but a high background level.
Is some cases we can use a gas detector, with a very low background level.
- lupolen is a solid polymer, wich produce a slope at I=6cm-1
- tetradecanol, or commonly myristyl alcohol, is a straight-chain saturated fatty alcohol, with the molecular formula C14H30O, and organized as a well structrured lamellar phases. SAXS spectra gives very fine peaks. First order is 0.1581 Å-1
We developed two software for the data treament :