SAXS - Small-Angle X-ray Scattering – University of Copenhagen

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SAXS  - Small-Angle X-ray Scattering

The SAXSLab camera at XNS/NBI is a GANESHA-camera designed by Karsten Joensen, SAXSLab/JJ-Xray, and funded by FNU, The Danish Science Council for Nature and Universe, The Carlsberg Foundation and The Lundbeck Foundation.

The X-ray source is a 40W micro-focus Cu-sources, Micromax 002+, from Rigaku .

The SAXS instrument comprises a next-generation SAXS instrument using advanced networked instrument control and data analysis. The instrument is fully automated and remotely controllable with capability of performing SAXS, MAXS, WAXS, GISAXS and Reflectometry on both isotropic and oriented samples.

The SAXS instrument is used for structural studies of materials of various kinds, including polymer systems, platinum based membranes for fuel cells, gels for replacing human intraocular lens, butter and cheese, and bio-membranes and protein structure in solution.

Sample Environment

The SAXS-instrument has two sample stages: I) a large spacious sample area inside the detector-tube allowing for a variety of sample environments and specialized measurement techniques; and II) Anton Paar type of sample environment placed just in front of the detector tube dedicated for solution samples with a) easy access to the sample without breaking the vacuum and allowing flow-through type of sample cells or b) small-volume samples (20myl).

Detector

The Pilatus 300k pixel-detector is situated inside a large continuous vacuum chamber, where its position can be controlled to adjust the distance between sample and detector. This allows access to structural studies from few Angstrom-level to several hundred nanometers spanning both the best SAXS instruments and standard WAXS range.

Source

The X-ray source is a 40W micro-focus Cu-sources, Micromax 002+, from Rigaku . The X-ray wavelength is 1.54Å

The collimator is based on the 3(4) motorized scatter-less slits configuration.

Software

The overall instrument and data acquisition is based in Spec, which is a UNIX/Linux based software package. The initial 2D data from the detector is read-out using Dectris-software. The motors are controlled using an 18-axis JJ-Motor Controller. SAXSGUI, based on a MATLAB platform, is used for further data reduction and analysis routines. 

  • For further information, contact prof. Kell Mortensen kell@nbi.dk, or associate professor Jacob Kirkensgaard jjkk@nbi.dk