The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

Apply for Beam Time

Next Proposal Deadline

The APS is issuing the 5th and Final Call for General User MX beam time requests to access the Diamond Light Source.

The Call is for Diamond AP35 Run 3 (June 19 to August 9, 2024) and Run 4 (September 4 to 30, 2024). The dates of the Call are listed below:

Call opens: Monday, May 20, 8 a.m. Chicago time

Call closes: Sunday, June 2, 11:59 p.m. Chicago time

This Call is only for Rapid Access MX proposals through the APS.

  • Proposals will be submitted to the APS peer review process, and beam time will be allocated based on referee ratings.
  • Beamline assignments and scheduling for allocated requests will be managed by Diamond staff based on experimental needs.
  • For proposals allocated beam time, the P.I. will be contacted with additional information related to user registration with the Diamond facility, safety documentation needs, and sample shipping.

Beam time will be allocated for ONLY:


Login: Universal Proposal System

New Universal Proposal System (UPS): 

In order to submit and/or be listed on an APS proposal, users must:

  1. Have an APS/Argonne badge number AND an ORCiD with APS authorized as a Trusted Party in your account. If you do not currently have a badge number, please register as a user.
  2. Log into the UPS platform and create a profile.

Please follow these detailed login instructions to access your UPS dashboard.

The UPS system offers tours to assist with learning the layout and function. In the near future, additional training materials will be shared to further enhance your familiarity with the UPS!

NOTE: The Universal Proposal System is currently only accepting proposals for the APS. Users needing to submit proposals at LCLS or NSLS-II will need to visit their respective facility websites.

Additional information: 

More Information
First-time Proposer
You must register as a user and receive a badge number before you can begin a proposal.
Returning Proposer

You may not need to submit a new proposal!

  • Same work
    • Check My APS Portal to find the status of your proposals.
    • If the relevant proposal is listed as "active," you may not need to create a new proposal.
    • Check the "shifts remaining" field on the first page of the proposal to make sure the remaining approved time is adequate.
    • If enough time is available, create a new beam time request from within the existing proposal.
  • New work
    • To change the focus or include new results, submit a completely new proposal. You can copy and edit an existing proposal.


To comment on the contents, please contact or 630-252-9090.