General-Purpose Small-Angle Neutron Scattering Diffractometer
GP-SANS | CG-2 | HFIR
Data Reduction Guidance
Modern GUI Notebooks
The links below provide guidance on using our Jupyter Notebooks featuring a built-in graphical user interface (GUI). The two separate guides correspond to the different absolute scaling methods utilized at GP-SANS. Your local contact will advise you on which method is appropriate for your specific experiment.
- Direct-Beam Method: Used when large or complex sample environments prevent a standard sample from being easily measured.
- User Guide - Data Reduction GP-SANS Direct-Beam
- Porasil Standard Method: Commonly used with the automated sample changer and mail-in program setups. User Guide - Data Reduction GP-SANS Porasil Standard
Automated Reduction
An automated data reduction routine runs in the background during experiments. This routine generates files compatible with GrASP (Graphical Reduction and Analysis SANS Program) for immediate visualization and analysis, which is detailed in the software section below.
Legacy Methods & Tutorials
The guides and videos below cover our legacy Jupyter Notebook workflows and data visualization tools. The PDF guide walks through locating your data on OnCat, executing the older notebooks, and accessing or visualizing your reduced data via MantidWorkBench.
- Data Reduction Guide for CG2 (GP-SANS)
- Data Reduction Tutorial Video 1
- Data Reduction Tutorial Video 2
Data Analysis Software
The GP-SANS instrument team currently officially supports two primary analysis software packages:
- SasView: An open-source, collaboratively developed software package designed for fitting and analyzing small-angle scattering data sets.
- GrASP: The Graphical Reduction and Analysis SANS Program (developed at the ILL), ideal for rapid visualization, inspection, and analysis of both standard and specialized data configurations.
Alternative Analysis Packages
While not natively supported by the beamline staff, the following package are frequently utilized by our user community for specialized data evaluation:
- Irena: A comprehensive suite of tools implemented within Igor Pro, highly optimized for modeling complex material structures, hierarchical morphology, and size distributions.
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