SSRL Experimental Run Schedule

The FY2024 SPEAR Schedule is linked here. Users can view and accept X-ray/VUV beam time assignments through the user portal, see schedule below by Beam Line Type (X-ray / VUV / Macromolecular Crystallography) and Beam Line (BL #). Visit the SPEAR status webpage for the latest accelerator updates.

Schedules are subject to change; contact the User Office or beam line staff for details.


(BL1-5, 2,1, 2-3, 4-1, 4-2, 4-3, 6-2a/6-2b/6-2c*, 7-2, 7-3, 9-3, 10-2a/10-2b**, 14-3a/14-3b*, 15-2, 17-2)

**BL10-2a/10-2b is under development and will not be available until later in 2024
BL2-2 is not currently supported


(BL5-2/4*, 8-2, 13-2/3*, 16-2)  

*Indicates beam lines with shared beam time between end stations which cannot run simultaneously.

Macromolecular Crystallography
BL9-2, 12-1, 12-2, 14-1)
see: Support Staff Schedule

FY2023-24 SPEAR Schedule


see Schedule Archive

In addition to the User OfficeSafety Office, and Beam Line contacts, the SSRL Duty Operator will be available 24/7 if you have questions or need any assistance during your visit.

Contact beam line staff to discuss SSRL capabilities and proposed research experiments. Contact the User Office if you have questions about COVID-19 impacts on your experiments.

To access SSRL beam lineslog into the user portal to submit new proposals or beam time requests (BTRs) by the posted deadlines. Review/accept beam time assignments and submit beam time support requests through the user portal.

SSRL Beam Line Schedule InformationMany factors are considered in scheduling SSRL beam time including availability of resources (equipment, beam line staff, etc.). Experiments with similar equipment configuration are scheduled together whenever feasible for maximum efficiency and to minimize downtime. Scheduling priority is given to highly rated proposals, while also considering the amount of beam time that has previously been allocated as well as the proposal team's demonstrated productivity (publications). A rating of ~1.4 is generally the initial cut off for beam time on most oversubscribed SSRL beam lines. Additional requests are kept in the queue and may be accommodated to fill cancelled beam time.

Note:   Many SSRL beam lines are significantly oversubscribed with highly rated proposals. Research teams with multiple proposals will be limited in the amount of beam time assigned. Requests for the most oversubscribed beam lines may be limited to 1 or 2 experiments per research group per run year, depending on the specific beam line availability.

Prepare to Visit SLAC & SSRLContact the designated SSRL beam line engineer/scientist a few weeks prior to arrival to discuss beam line configuration needs and to confirm your estimated start time. Most beam lines officially turn over to the next user BEFORE 3 pm, but usually it is much earlier in the day depending on equipment requirements and staff availability. Plan to arrive early in the morning (~ 8 am) to assist beam line staff who may have questions about your set up and to complete training if applicable.

Before traveling to SLAC, all users must be registered on the SSRL/LCLS user portal, be listed on a scheduled proposal, and complete training (review access procedures).

BRING ORIGINAL IDENTIFICATION DOCUMENTS to the SLAC SUSB VUE Center and Security Badging Office to obtain an ID badge or renew SLAC access. This is required at the start of each run year (October-September).

Accelerator Schedule (for staff)

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