Advanced Photon Source at Argonne National Laboratory   APS USAXS instrument
USAXS instrument at the Advanced Photon Source,
X-ray science division, beamline 9ID-C

Advanced Photon Source

A U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences national synchrotron x-ray research facility

Argonne Home > Advanced Photon Source > USAXS >

Staff web pages:
      Jan Ilavsky, inst. scientist

      Glassy Carbon int. stnd.
      Example USAXS data
      Getting beam time
      Instrument Geometries
      USAXS imaging
      Sample Holders
      Select publications
      User publications
              prior 2000
      Shipping Address
Live USAXS data
Software by Jan Ilavsky:
      Indra (reduction)
      Irena (analysis)
      Nika (2D data reduction)
      Cromer-Liberman AtFF
      Clementine (kinetic rate analysis)
      other macros
Useful WWW links

Ultra-Small-Angle X-ray Scattering Facility

instrument scientist: Jan Ilavsky, 630-252-0866,

The heart of the Ultra-Small-Angle X-ray Scattering (USAXS) facility located at 9ID beamline, station C, at Argonne National Laboratory is an advanced-design Bonse-Hart camera (USAXS) with integrated fixed length pinhole SAXS camera (pinSAXS), and on request available WAXS camera.

The USAXS/pinSAXS instrument provides World-unique capabilties:
Standard configuration (Si220 crystals)
Energy range ..........10 - 18 keV
Q range .................. 0.0001 to 1.2 [1/A] (depending on energy used)
Intensity range ........ up to 12 decades (depending on sample)
Q resolution ............ ~ 0.00008 [1/A] in the USAXS range (up to 0.1 [1/A])
WAXS capabilities if requested, d spacing range approximately 6A to 0.9A (Pilatus 100k as WAXS detector)

Per request (with justification) special configuration (Si440 crystals)
Energy .................... ~24 keV
Q range .................. 0.00003 to 1.2 [1/A]
Intensity range ........ up to 12 decades (depending on sample)
Q resolution ............ ~ 0.00003 [1/A] in the USAXS range (up to 0.1 [1/A])
WAXS capabilities if requested, d spacing range approximately 6A to 0.9A (Pilatus 100k as WAXS detector)
example of data is at the end of this page.

USAXS/pinSAXS and WAXS can be scheduled together on request made during beamtime scheduling and only if APS can provide the deetctor from equipment pool.

Search for USAXS postdoc: USAXS is looking for Postdoc. Position is now ready to be filled and if you are interested, you can apply through ANL job place ( You need to look for Postdoctoral Applicants, requisition number 400231 (it is at the XSD division). Here is more information.

Want to see how USAXS operates? 3 min (166Mb) movie with data collection is here: USAXS_operations.mp4

For details and to refer to the use of the USAXS instrument, please use following publication:
Ultra-small-angle X-ray scattering at the Advanced Photon Source. J. Ilavsky, P.R. Jemian, A.J. Allen, F. Zhang, L.E. Levine and G.G. Long. Journal of Applied Crystallography, 2009, 42 (3), p 469-479.
Abstract: The design and operation of a versatile ultra-small-angle X-ray scattering (USAXS) instrument at the Advanced Photon Source (APS) at Argonne National Laboratory are presented. The instrument is optimized for the high brilliance and low emittance of an APS undulator source. It has angular and energy resolutions of the order of 10-4, accurate and repeatable X-ray energy tunability over its operational energy range from 8 to 18 keV, and a dynamic intensity range of 108 to 109, depending on the configuration. It further offers quantitative primary calibration of X-ray scattering cross sections, a scattering vector range from 0.0001 to 1 A-1, and stability and reliability over extended running periods. Its operational configurations include one-dimensional collimated (slit-smeared) USAXS, two-dimensional collimated USAXS and USAXS imaging. A robust data reduction and data analysis package, which was developed in parallel with the instrument, is available and supported at the APS.

For more publications see here.

APS highlights from USAXS work: 2013, 2007

USAXSusers awards: Student award 2015,

Large pinhole SAXS camera with 0.6m, 2m, and 4m lengths and energy range 10 - 30 keV is located at beamline 15ID ChemMatCARS.

1D USAXS Schematic


collimating channel-cut crystal

Schematics of USAXS instrument. For illustration only, NOT for publications. For latest updated drawing please contact beamline scientist.


Schematics of USAXS-SAXS-WAXS

Schematics of the USAXS - SAXS - WAXS instrument with all three geometries. Data are collected sequentially using the three devices. Changover time between detectors is about 30 seconds.

USAXS spheres

Example of scattering of 1 micron Polystyrene spheres in solution.

SiO2 scattering

Example of scattering of 1 micron SiO2 spheres in aqueous solution.

In situ data collected at 226C over 16 hours using USAXS, SAXS, and WAXS on Al alloy. Courtessy of A. Allen, L. Levine, and F. Zhang, NIST.

USAXS/pinSAXS/WAXS data : In situ data collected at 226°C over about 16 hours represent microstructure evolution of AA2024 aluminum alloy (Allen, Levine, and Zhang, NIST). USAXS data enable quantification of second phase formation (size and volume), WAXS enables phase identification. 

High explosives Microstructure change

USAXS/pinSAXS/WAXS in situ data : Data collected by LLNL (Tervor Willey on high-explosives. The material is composite of two high-explosives and plastic binder. The WAXS clearly shows phase changes while USAXS/pinSAXS data show microstructure change as function of heating.




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This page last modified: 2015-09-04 9:36 AM