Argonne National Laboratory



Department of Energy Office of Science
GM/CA @ APS Sponsors:
National Institute of General Medical Sciences (NIGMS) and National Cancer Institute (NCI) of the National Institutes of Health (NIH)

Experimental Envelope

Pin types and lengths:
- All standard Hampton type cryo pins can be accommodated.
- All MiTyGen pins will be accommodated
- All Lytholoops will be accommodated.

User Data Backups

Supported media: 
- External USB disks (USB-3 is strongly advised due to high transfer rate).
- SFTP or FTP out to the home lab. Three computers per beamline are available for outside access during experiment.
- No other devices (tape drives, DVD burners etc) are supported or provided.

Supported formats: 
- FAT32, NTFS, ext3, exFAT, and HFS+ are all supported on external USB drives.
- FAT32, NTFS, ext3, exFAT formatted drives can be connected to any Linux computer except for ws2 and ws3.
- HFS+ needs a commercial driver and therefore it is supported by only three Linux computers per beamline: ws4, ws5, and ws7.

Please check back for latest updates. Our standards will change as new drivers are made available.

Note: Users can bring disks with ANY FORMAT if they are connected to users’ own portable computers. In this case backup may be slower.

23ID-D station as of 07/2005


Energy range 6-20* keV

Energy resolution ΔE/E < 2x10-4

Minimum focal spot size at the sample position 25x62 μm2

Beam size can be adjusted up  

Focal spot position can vary from sample to infinity

Flux 1x1013 photons @ 12keV

Attenuation from 0 to 100%


Single, fixed-horizontal axis*. Rotation speed up to 360o/sec for sample centering, adjustable for data collection

Maximum 2θ angle is 45o at 70 mm and 20o at 1000mm*

Sample-to-detector distance 183-3000 mm*

Beamstop-to-sample distance adjustable in 30-109* mm range

On-axis visualization system with high magnification (32 times)


MARmosaic 300 with 300 mm2 sensitive area and 4096x4096 pixels

Highest achievable resolution ~0.4* Å @ 20 keV and 2θ=45o (0.63 Å @ Se edge)

Highest achievable resolutions at 2θ=0 are 0.58 Å @ 20 keV and 0.91Å @ Se edge


Energy resolution ~150 eV @ 1000 cps

Anomalous diffraction experiments can be carried out over entire energy range


Experiment setup and data collection with JBluIce, the GM/CA software resembling interface of SSRL BluIce.

For data processing, HKL2000, d*TREK and MOSFLM provided and supported

All popular crystallographic programs and packages provided (some unsupported)

SAMPLE CRYO COOLING with Cryojet. Assortment of cryotools and dewars provided

Cold room provided

Microscopes in the wet lab, cold room and X-ray hutches are provided

* indicates the parameters and/or components which will change later.


GM/CA @ APS is an Office of Science User Facility operated for the U.S. Department of Energy Office of Science by Argonne National Laboratory

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