2017 January 25 - March 7
2017 March 15 - April 24
2017 May 17 - June 29
2017 Proposal deadline: 03/20/17
2017 BTR deadline: 04/17/17
2017 October 11 - December 21
2017 Proposal deadline: 08/01/17
2017 BTR deadline: 09/10/17
MacCHESS – macromolecular crystallography
|A1 Beamline Specifications|
|Source:||1.5m CHESS Compact Undulator|
|Technique:||Monochromatic macromolecular crystallography; Microcrystallography|
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.
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).