General User Proposal call at the National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory, for the next four-month beamtime cycle (2027-1). All beam time is requested each cycle via the Proposal Allocation, Safety, and Scheduling System (PASS). Regular deadlines fall on 31 January, 31 May and 30 September.
Deadline: 30 September 2026, 23:59 US Eastern. See Apply for beamtime.