CHESS West - C1

The old C line stations, C1 and C2, have a long and successful history as the primary EXAFS hutches for CHESS. In particular, the C2 "workhorse" monochromator has been optimized for energy step scanning in ranges between 6 and 35 keV. We are currently in the process of completely rebuilding the C line, creating a single large station with many new capabilities. The C2 monochromator will be relocated to B2 (a space slightly larger then C2) where it will continue to provide x-rays for EXAFS and near-edge spectroscopies. Both the B2 and C hutches will have improved gas handling and toxic venting.

The scientific capabilities of C-line will shift and beams for a much broader range of experiments will become available. The new C-line hutch will be a spacious facility with a mission that includes both monochromatic high-resolution 4-circle diffraction and continuous energy range, focused beam data collection using the latest methods in diffraction and absorption spectroscopy. The x-ray optics, which are housed in a new vacuum coffin, will include both a highly flexible double bounce monochromator with sagittal focusing and a large side diffraction focusing monochromator (see photo below). Either system can be used with a mirror for vertical focusing and/or harmonic rejection. The station is white-beam capable, equipped with both a large 4-circle diffractometer, and a "floatable" precision optical table used for mounting experiments that intercept the side bounce focused beam.

The side bounce horizontal crystal bender.  The triangular crystal is supported by a water-cooled copper block.