College Park, Maryland      June 6 - 10 , 2004

WP72: SANS Data Reduction and Analysis Using ISAW

A. Chatterjee (Intense Pulsed Neutron Source, Argonne National Lab), R. Mikkelson, D. Mikkelson, M. Miller, B. Serum, C. Bouzek (University of Wisconsin-Stout), J. Hammonds, T. Worlton, J. Tao (Intense Pulsed Neutron Source, Argonne National Lab)

Small-angle neutron scattering (SANS) instruments probe sizes and shapes on length scales of ~ 0.5 100 nm. A wide range of systems that include biological, chemical, solid-state can be studied using SANS. Typically, these instruments use low-angle forward scattering techniques and have area detectors the data from which is reduced to produce scattering intensity, I(q). A number of steps precede the calculation of I(q) like calculation of the beam center, sensitivity of the detector pixels, transmission coefficients etc. Integrated Spectral Analysis Workbench (ISAW) is a software package developed at IPNS to reduce, analyze and visualize neutron scattering data. It has recently started supporting the upgraded small-angle neutron scattering instrument (SAND) at IPNS. ISAW provides a collection of scripts and wizards that do all the steps in the SAND data treatment. The scripts and wizards make use of java operators in ISAW. To process multiple runs, ISAW provides a script that processes files in a batch mode. The q bins can be 1 or 2 dimensional with a resolution that can be set in the scripts. A number of viewers that come with ISAW can be used to look at the reduced files and the output from some viewers of data collected on SAND will be presented.

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