BEAMLINE COMMISSIONING & DETECTOR CHARACTERIZATION

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This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. At the beginning of each run we typically require 2-3 days of commissioning to characterize and verify the performance of the bemline. This involves the following tasks: x-ray beam alignment and steering (this involves centering the undulator beam along the defined beamline reference points), monochromator alignment, calibration and focusing (this involves measuring the monochromator rocking curve, energy calibration by using a Au foil and focusing parameters as a function of the energy), vertical focusing mirror alignment and commissioning (this includes setting the focusing parameters at different configurations), ion chamber linearity testing and solid state detectors commissioning. Additional commissioning time (6 shifts included in total) was required to calibrate the Aviex and Brandeis area detectors for SAXS and fiber diffraction applications. Also included in this time is setup time for changing to SAXS or WAXS from other modalities (12 shifts included in total)