Data Reduction

To make your data processing easier, we provide the essential software tools for data reduction.

SAXS data reduction

The processing of the raw SAXS patterns consists of a series of corrections, followed by an azimuthal integration between specified limits. Specific Matlab programs have been created for BSL, edf, tiff and hdf5/nexus  data.

The following corrections are applied to the SAXS images:

• normalization of the image with respect to the intensity of the incident beam
• q calibration; we often use silver behenate (moderate to high q range) or rat tail collagen (low q)
• correction for sample transmission and background subtraction
• masking of unwanted pixels
• azimuthal integration (using pyFAI)
• intensity calibration in cm^-1 (if used)
• invariant calculation.

Below we present an illustration of SAXS data reduction using one of our Matlab programs calling fit2d (in a Linux environment).

WAXS data reduction

• q calibration standards: alpha alumina, high density polyethylene, NIST silicon powder