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 (this operation is outsourced to program fit2d). Specific Matlab programs have been created for BSL, edf, and tiff data.

The following corrections are applied to the SAXS images:

• normalization of the image with respect to the intensity of the incident beam
• correction for sample transmission and background subtraction
• masking of unwanted pixels
• azimuthal integration (using fit2d)
• 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

WAXS data are processed using the XOP package in order to correct the geometrical distortion due to detector's position, and to calculate the diffracted intensity via azimuthal integration. XOP supports edf and tiff data formats.

Below we present an illustration of WAXS data reduction by an IDL program that calls XOP (also in a Linux environment).

Note that the User's survival manual explains in detail how to use these procedures.