What is small-angle scattering?

Small-angle scattering is the premier technique for the size characterization of nanoscale objects.

Our Mission

The Small-Angle Scattering special interest group at Argonne National Laboratory has been created to promote awareness of the small-angle scattering facilities at the APS, IPNS, and elsewhere on the Argonne campus and to foster communications between the various research groups. Through this group, we believe we can build a strong user community for small-angle scattering at the APS, IPNS, and throughout Argonne.

Courses organized by SAXS SIG:


SAS images

Small-Angle Scattering Short Course 2015: “Beyond RG

Will be organized by APS SAXS SIG on March 2 - 6, 2015.
Advanced Photon Source, Argonne National Laboratory

Link to main web site

If you have any questions, you can send e-mail to : organizers.

The objective of the Small-Angle Scattering Short Courses is to raise the capabilities of the small-angle scattering (SAS) community by providing an intermediate-level course for those in need of a better understanding of SAS theory, and techniques utilized at the APS.

The SAS short course will offer an overview of SAS theory, capabilities, and data reduction and analysis tools to enable the community to submit highly effective beam-time proposals and to facilitate better utilization of the resources at the APS.

This course will follow in the footsteps of the highly succesful similar courses in 2013, 2012, 2010, and 2008. If you would like to read the report from one of the previous courses, please see: 2012 Short course report


SAXS Software Packages Irena and Nika

Last course at the APS was 18-19 September, 2014.

If you would like to put your name on pre-registration list for next one (May 2015 around APS users meeting?), contact Connie.

Hardware & software requirements

Successful small-angle x-ray scattering (SAXS) experiment requires appropriate data reduction and analysis tools. Igor Pro based packages Nika (for SAXS data reduction) and Irena (for SAXS data analysis) were developed during the last 10 years at the APS. They are already being used widely for material science SAXS at the APS and at other facilities worldwide. These tools are commonly taught during "Beyond Rg" - SAXS short course organized semi-annually by APS SAXS SIG (next one scheduled for March 2012). However, the main audience of the SAXS short course is new SAXS users, starting with their own SAXS program and therefore it focuses more heavily on experiments, theory etc. The time devoted in this course for software is insufficient for experienced experimenters interested in complex software applications.

Therefore, the APS SAXS Special Interest Group (SIG) is organizing this specialized, hands-on, course specifically on the SAXS software Nika and Irena. The course will be taught by the software author, Jan Ilavsky, APS staff member. In order to provide high educational value, the number of participants will be limited to 20. Participants are expected to have a high level of SAXS experience and bring their own computers (Windows or OSX). In addition, they are encouraged to bring their own SAXS experimental results.

NOTE: This course is NOT for bioSAXS (protein structure and similar mono dispersed systems), the Irena software is mostly suitable for polydispersed and complex (hierarchical) systems. If you are not sure if your scientific application fits in the scope of this software, please ask.


Past courses organized by SAXS SIG:

Small-Angle Scattering Course 2008: "Beyond Rg"

Small-Angle Scattering Course 2010: "Beyond Rg"

Small-Angle Scattering Course 2012: "Beyond Rg"

Irena & Nika software courses