Proposal Calls

Results of 2023-A General User Proposal Call

The Neutron Sciences General User Proposal Call 2023-A closed on September 21, 2022. Award letters for 2023-A submissions were sent November 15. Results are summarized on the Proposal Statistics webpage.

Proposals awarded 2023-A beam time at Spallation Neutron Source (SNS) will be scheduled to run from February to August 2023.

Proposals awarded beam time at HFIR will be scheduled to run from March to July 2023.

Future Submission Deadlines

Due to the planned Proton Power Upgrade (PPU) outage starting in August 2023, SNS instruments will not be accepting proposals in the 2023-B or 2024-A proposal calls.

The current HFIR/SNS 5-Year Working Schedule expects SNS availability to resume July 2024 contingent on PPU progress. Details about SNS availability in future proposal calls will be posted here.

2023-B General User Proposal Call Overview

  • Submission deadline: Wednesday, February 22, 2023 (noon Eastern)
  • Experiment run dates: August to December 2023
  • Award notifications: by April 26, 2023
  • Facility: HFIR only

2024-A General User Proposal Call Overview

  • Submission deadline: Wednesday, August 30, 2023 (noon Eastern)
  • Experiment run dates: January to June 2024
  • Award notifications: by October 25, 2023
  • Facility: HFIR only

Researchers should apply directly via the Integrated Proposal Tracking System (IPTS). For more information, contact the User Office.