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X-RAY RUNS: Apply for Beamtime

2017  Nov 1 - Dec 21

2018  Feb 7 - Apr 3
2018  Proposal/BTR deadline: 12/1/17

2018  Apr 11 - Jun 4
2018  Proposal/BTR deadline: 2/1/18

 A1      A2      B1      C1      D1      F1      F2      F3      G1      G2      G3    


MacCHESS – macromolecular crystallography

A1 Beamline Specifications
Source: 1.5m CHESS Compact Undulator
Technique: Monochromatic macromolecular crystallography; Microcrystallography
Energy: 19.6 keV
Detector: ADSC Quantum-210
*Other sizes available on request

A1 is fully equipped for monochromatic macromolecular crystallography; features include a single-axis goniostat, Oxford Cryosystems cryocooler, high-resolution crystal viewing system with autocentering as well as click-to-center software, ALS-style BAM-2 crystal automounter which accepts multiple types of puck, and an ADSC Quantum-210 CCD detector. Standard beam sizes are 100 µm (using a collimator) and 20 µm (using a focusing capillary); custom capillaries producing smaller beams are available. Conveniences include computer-controlled crystal annealing and special illumination to enhance a sample’s visibility, using its intrinsic fluorescence. The ADX data collection GUI provides experimental control.

The X-ray energy at A1 is currently 19.6 KeV (corresponding to a wavelength of 0.63 Å), due to the use of a diamond monochromator. Special illumination which enhances sample visibility by using intrinsic protein fluorescence is installed.

Mail-in and remote data collection modes are available, and a high level of support is provided for both on- and off-site users.

Figure 1

Crystallography equipment: rotation stage in the center; a mounted crystal would be just behind the yellow tape (which holds the beamstop); cryostream at top left, also the crystal-viewing camera, which is mostly hidden behind the cryostream; detector at right; automounter out of view to the left. Beam enters from the left (collimator was not in place when this photo was taken).