XAFS and micro-XAFS at the PNC-CAT beamlines

The Pacific Northwest Consortium Collaborative Access Team (PNC-CAT) is con structing bending magnet and insertion device (ID) beamlines at the Advance d Photon Source. Both beamlines will be heavily used for XAFS and micro-XAF S experiments. This paper summarises their capabilities, and initial operat ional experience with the ID line. The ID beamline is based on APS undulato r A, and has been running in an initial commissioning configuration since M ay 1997. Currently the undulator and monochromator energies can be scanned in synchrony for EXAFS measurements, and we have obtained focused beams as small as 0.7 micron using tapered capillaries. Initial testing has also beg un on a MBE/UHV system for in-situ surface XAFS.