The GCPCC beamline is located at the Center for Advanced Microstructures and Devices (CAMD), which is operated by Louisiana State University. The CAMD synchrotron is a second generation source that is currently operated at 1.3 GeV with an injection current of 100 mA and 2 fills per day.
The GCPCC beamline utilizes 1.5 mrad of the output of a 11-pole 7.5 Tesla super conducting wiggler. The x-rays are collimated vertically by a fixed radius cylindrical mirror, monochromatized by either a channel-cut monochromator or a multilayer monochromator and focused by a toroidal mirror with an adjustable major radius.
The channel-cut monochromator is designed for MAD data collection and has a channel-cut Si crystal in the 111 orientation. The bandpass (Δλ/λ) is approximately 2x10-4. The multilayer monochromator will have a bandpass of about 5x10-3 which will greatly increase the x-ray flux on the sample. The bandwidth from the multilayer system will be too large for MAD use but will be good for most other data collection from crystals with a unit cell of less than about 200 Å. It is possible to switch between the 2 monochromators depending on the requirements of the experiment.
With Si(111) Channel Cut Crystal Monochromator
With Multilayer Monochromator (not yet in service)
Chi motion for crystal mounting (0 - 60°) Motorized sample alignment (Marxy) system
Other equipment/facilities available
Computers and Software
The beamline has computers running Linux (RHEL and Centos) with the following crystallographic software:
Data are stored on a Network Attatched Storage system confgured to provide 1 TB of RAID 1 (mirrored) disk space. This corresponds to about 120K uncompressed ccd images.
Both wired (100 base T) and WiFi connections are available for user's laptops.
Portable Hard Drives and Data Sticks USB 2.0
The appropriate media should be provided by the user for data backup.