Deadline for submission: 2 p.m. CT, Wednesday, March 5, 2025

As the Advanced Photon Source (APS) accelerator and storage ring return to operations, beamlines around the facility will begin to resume their user programs. The timelines for bringing users back will vary beamline to beamline.

This call for the 2025-2 cycle (June - September 2025) is soliciting proposals for possible experiments that will be considered based on each beamline's individual schedule and capabilities. The submission deadline is 2 p.m. CT on Wednesday, March 5, 2025.

Proposal types that will be accepted for this call include:

• General user - regular
• General User - macromolecular crystallography
• eBERlight - macromolecular crystallography and general user
• Resource Staff (includes CAT and APS staff)
• CAT member
• Partner user proposal
• Feature Beamlines (available Feb. 3) - CHEX (28-ID), ATOMIC (34-ID), and 3DMN (34-ID)

Information about the specifications and capabilities of the post-upgrade beamlines can be found in the APS Beamlines Directory. Principal investigators are encouraged to contact beamline scientists for more detailed information on the status and current capabilities of the beamlines.

Note: Only those beamlines that are ready to support general users will be available to select in your request for beam time in the Universal Proposal System (UPS).

For questions about the UPS or the proposal submission process, email apsproposals@anl.gov.

For guidance on the proposal system, visit the UPS webpage.

For general inquiries, email apsuser@anl.gov or call 630-252-9090.