The next General User Proposal Call opened on Monday, May 25, 2026 and the APS will be accepting new proposals and follow-on experiment time requests for the 2026-3 run cycle.
Call closes: June 24, 2026, 14:00/2:00 p.m. (Chicago time)
Event categories: Proposal Deadlines
European XFEL – 15th Call for Proposals for User Experiments
The 15th call for proposals at the European X-Ray Free-Electron Laser Facility (European XFEL) is open until
Thursday, 07 May 2026, at 16:00 CEST
(local Hamburg/Schenefeld time / Central European Summer Time)
SOLEIL’s call for proposals
2026/07/15 till 2026/09/15
Location: SOLEIL synchrotron, Saint-Aubin, France
Deadline: September 15th, 2026, at 17:00 (CET)
The call for Proposals for the 2027-I cycle will cover experiments scheduled during the first semester of 2027, except for BAGs, which will cover the entire year, and MX-BAGs, which will cover 2 years.
PAL-XFEL Call for Proposals
2026-2nd Call for Proposals at PAL-XFEL
We invite scientists worldwide to submit proposals for general user beamtime experiments at PAL-XFEL (Pohang Accelerator Laboratory – X-ray Free Electron Laser) from August to December 2026. PAL-XFEL has three beamlines, two for hard X-ray experiments (XSS: X-ray Scattering and Spectroscopy, NCI: Nano Crystallography and Coherent Imaging) and one for soft X-ray experiments (SSS: Soft X-ray Scattering and Spectroscopy). The access to PAL-XFEL is open to the international scientific community, with the requirement that foreign users collaborate with Korean scientists being local contacts. Additionally, all applicants must contact PAL-XFEL staff scientists to discuss experimental details before submitting a beamtime proposal. There is no fee for proposal submission, but charges will apply when the experiment is conducted, as per government policy. Please register as a user of PAL and submit an application form of the PAL-XFEL proposal via the website (https://pal.postech.ac.kr/en/index.do).
- Call for Proposal Deadline: April 24, 2026 (Korean Standard Time)
Diamond call for proposals
The next submission for proposals for AP40 is open. The call for proposals for AP40 (October 2026 - March 2027) is open and proposals must be submitted by Wednesday 25th March 2026 at 17:00hrs UTC/GMT.
For submissions of proposals please see here: Apply for beamtime.
For updates to the XChem BAG submission see: XChem BAG submission
For MX related proposals please refer to the MX Responsive Beamtime Guide.
BESSY II – call for proposals by 1st September 2026 (CET 11.59 pm)
Round 2027-I Beamtime peroid January 2027 - July 2027
Deadline 01.09.2026 (CET 11.59 pm)
BESSY II – call for proposals by 1st March 2026 (CET 11.59 pm)
Round - 2026-II Beamtime period - July 2026 - January 2027
Deadline - 01.03.2026 (CET 11.59 pm)
RIANA (Research Infrastructure Access in Nanoscience & Nanotechnology) – SME User Access
The SME Call for Proposals is Now Open.
The application is open throughout the project and implemented as a rolling call.
RIANA (Research Infrastructure Access in Nanoscience & Nanotechnology) – TNA User Access
The RIANA – TNA Access is Now Open.
We accept user proposals based on a “continuous call” concept.
Applications for Pre-proposals are not mandatory but are highly encouraged.
ALBA Call for Proposals
The Call for Proposals for the 2026-II cycle for beamlines and microscopes is now open.
- Deadline: March 3rd, 2026, at 14:00 (CEST)
The Call for Proposals for the 2026-II cycle will cover experiments scheduled from end of June to December 2026, except for the MX Beamlines, which will cover the entire year.
- Information about the specifics of the beamlines can be obtained here
- Information about the specifics of the microscopes can be obtained here
For those users applying to MSPD, CLAESS and NOTOS: if your proposal goes to the waiting list, it can be moved to another beamline in case enough beamtime is available. Please, indicate your preferred beamline and the second option in the text of the proposal.
Applications for researcher’s access to beamlines and electron microscopes will be submitted the user office portal.
CLS Call for Proposals
Twice a year, the CLS opens a Call for Proposals during which time proposals are accepted for peer-reviewed access to beamtime in the upcoming cycle. Each cycle is typically 6 months long. Successful proposals become active projects at the CLS and remain active for 2 years. During an open Call for Proposals, beamtime requests (BTRs) for active projects can also be submitted for consideration in the upcoming cycle.
| Cycle | Scheduling Period | Call Open | Call Close | PRC Meeting (Week of) |
Results Announced (Week of) |
|---|---|---|---|---|---|
| 42 | July-Dec 2026 | Jan 28, 2026 | Feb 25, 2026 | Apr 20, 2026 | May 4, 2026 |
CHESS Call for Proposals and Beam Time Requests (BTRs)
* Rapid Access proposals are selectively accepted. Among the beamlines, MacCHESS beamlines (7A XBio / BioSAXS and 7B2 XBio / FlexX) and MSN-C beamlines (1A3 SMB and 3B FMB) accept Rapid Access proposals. Consequently, peer reviews for MacCHESS beamlines are continuous. MSN-C operates as a closed system and is not subject to peer review.
CHEXS beamlines (2A PIPOXS, 3A FAST, and 4B QM2) do NOT accept Rapid Access proposals. Proposals and beam time requests adhere to the deadlines listed above. Peer reviewers should observe the deadline above.
Information on Beamlines and the proposal process can be found here.
Call for 2026A SPring-8 Research Proposals
Deadline for Proposals (Japan Time)
- Proprietary Proposals, Non-Proprietary Priority Proposals, and Measurement Service Proposals: November 19, 2025, 10:00 am
- General Proposals and Graduate Student Proposals: December 9, 2025, 10:00 am
SESAME call for proposals
We wish to inform you that the eleventh Call for proposals is now open for the user period April 01st, 2026, to September 30th, 2026.
The deadline for submitting proposals is November 18th, 2025 at 23:59 (Jordan time).
Proposals must be prepared and submitted through the online portal:
https://sup.sesame.org.jo/pls/vuo/guest.startup
Before preparing your proposal, please carefully check all the information available at the address: https://www.sesame.org.jo/beamlines. We would recommend that you contact the relevant beamline staff to discuss your proposed project.
Rolling Call for ReMade-TNA
Under the new Rolling Call, proposals can be submitted at any time during the period September 2025 - May 2026, giving scientists more flexibility and time to carefully prepare, develop, and refine their research ideas.