Since September 2019, the National Science Foundation (NSF) supports the operation of the Center for High Energy X-ray Sciences (CHEXS) at the Cornell High Energy Synchrotron Source (CHESS) as a national user facility. CHEXS consists of a suite of high-energy X-ray beamlines that serve the national user community in specifically targeted research areas in materials research, biology and engineering.

Since CHESS resumed user operation after the CHESS-U upgrade project in October 2019, the facility has operated at 50mA positron current. Accelerator and beamline scientists have continuously and carefully optimized storage ring parameters and beamline performance to deliver high intensity and stable X-ray beams to users. This effort has allowed us to increase the ring current to 75 mA on Feb. 18 and now to 100mA on March 11^th.