Users Guide Find everything you need to get started, schedule beamtime, prepare samples, and access our beamlines—whether you're new to SER-CAT or a returning user. Use the quick links below for easy access to our most important resources and forms. New User General User Proposals Sample Shipping Info Pins, Bases & Pucks ESAF End of Experiment Form Downloading Data SERGUI User Guide SER-CAT operates two advanced X-ray crystallography beamlines at Argonne National Laboratory: 22-ID-D - Variable wavelength beamline 22-ID-E - Fixed wavelength beamline You can use our beamlines to collect structural data on your protein or molecular samples. We support both remote data collection (from your institution) and on-site visits (in person at Argonne). For full instructions, see detailed guides linked above. If you need support or have questions, contact SER-CAT support.