Advanced Crystallography

NSF’s ChemMatCARS has implemented a “rapid setup” crystallography facility that allows us to rapidly switch operation to the single-crystal instrument. The diffractometer is pre-aligned internally and can be moved into the beam when required. This flexibility allows us to take advantage of beam availability at short notice. This capability has been used extensively in user experiments.

In February 2008, we updated this setup by integrating a fast-readout Bruker APEXII detector with NSF’s ChemMatCAR’s new Bruker D8 diffractometer. The new equipment has been commissioned successfully.


See The Advanced Crystallography Setup In Action



Crystallography Contact

Techniques Include:


Experiment Specifications

  • Energy Range: 6 – 70 keV (2.0 – 0.18 Å)
  • Max. Beam Size: 200 x 200 µm (3 x 1012 ph/s/0.1% bandwidth)
  • Min. Beam Size: 80 x 80 µm
  • Diffractometer Type: Bruker D8 fixed-chi with 2θ detector rotation
  • Sphere of Confusion: Currently < 5 µm radius
  • Software: APEXII suite
  • Sample Environment:
    • Cryojet N2 cold stream (90 – 300 K temperature range)
    • Open-flow liquid He cryostat (10 – 70 K temperature range)
  • Bruker APEXII detector (62 x 62 mm active area) with four ports readout
    • Readout with 8 x 8 binning ~ 1 s (uncorrelated)
    • Readout with 4 x 4 binning ~ 1.5 s (uncorrelated)
  • High spatial resolution ~ up to 4.1 Å-1.


NSF’s ChemMatCARS is a participating partner in the SCrAPS (Service Crystallography at the APS) Program. This program allows remote access to the micro-crystallography facility.