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World's First Hard X-ray Free-electron Laser

The Linac Coherent Light Source at SLAC takes X-ray snapshots of atoms and molecules at work, revealing fundamental processes in materials, technology and living things. LCLS is an Office of Science User Facility operated for the U.S. Department of Energy by Stanford University.

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                                          PROPOSALS PROJECTS

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Latest Proposal Schedule

A call for proposals is generally made twice per year, approximately eight months before the run is scheduled to begin.

Mode of AccessRun CycleProposal Call StatusDeadlineCycle BeginsCycle Ends
Regular User ProposalsLCLS 25Proposals under review Sep 2025Feb 2026
Data Collection & Screening (DC&S)LCLS 25Proposals under review Sep 2025Feb 2026
MeV-UED Regular User ProposalUED 6Accepting Proposal Submissions16 May 2025Oct 2025Aug 2026
Rapid AccessLCLS 24Accepting Proposal Submissionsn/aMar 2025Jul 2025

Calls For Proposals are posted on the LCLS Announcements, and e-mailed to the LCLS User Organization e-mail list (subscribe to lclsuo).

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