SSRL Experimental Run Schedule

Planning is underway for the remainder of our FY2021 SPEAR operations (through August 2, 2021 when we shutdown for maintenance and upgrades). COVID related limits to on-site activities will continue for some time. Currently we are only able to request site access for users from within the US (bring your vaccination record). Many experiments continue to be done remotely by beam line staff in coordination with users.

Contact beam line staff to discuss SSRL capabilities and proposed research experiments. The draft schedules provided below are subject to change, so please contact the user office or beam line staff for the latest details. We endeavor to schedule as many user experiments as possible, but overall there will be fewer experiments scheduled this year. This is a dynamic situation, and SSRL is doing everything possible to continue to perform world class science as well as to ensure the safety of our staff and users.

X-ray 2021

(BL1-5, 2,1, 2-2, 2-3, 4-1, 4-2, 4-3, 6-2, 7-2, 7-3, 9-3, 10-2, 14-3, 15-2, 17-2)

VUV 2021

(BL5-2/4*, 8-2, 10-1, 13-2/3*, 16-2)  

*Some VUV beam lines cannot run simulatenously.

Macromolecular Crystallography

(BL9-2, 12-1, 12-2, 14-1)
see also: Support Staff Schedule

FY2020 SPEAR Schedule (ended Sept. 2020)

FY2021 SPEAR Schedule (Oct. 2020 - August 2021)


see Schedule Archive

To access SSRL beam lineslog into the user portal to submit new proposals or request beam time 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. 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). Availability of both equipment and beam line staff are also considered. Experiments with similar equipment configuration set ups are scheduled together whenever feasible for maximum efficiency and to minimize downtime. A rating of ~1.45 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:  If members of the same research team have several proposals, they will not necessarily be granted beam time for each proposal or request in each scheduling period. Many SSRL beam lines are significantly oversubscribed with highly rated proposals; consequently, requests for the most oversubscribed beam lines will likely be limited to 1 or 2 experiments per research group per run cycle or run year, depending on the specific beam line availability.

Prepare to Visit SLAC & SSRLContact the designated SSRL beam line engineer/scientist at least one week 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).

The Department of Energy (DOE) requires all foreign nationals (non US-citizens) looking to conduct work on-site at SLAC to provide their curriculum vitae (CV). The CV must chronologically list all science and technology activities and specialties, with no gaps in time since college (Associates/Bachelors or equivalent). Please be prepared to provide CV and all required immigration documents (green card, passport, etc.) upon arrival at SLAC. CVs will be uploaded to the DOE Foreign Access Central Tracking System (FACTS). By providing this information, you consent to SLAC sharing this information with the DOE.

In addition to the User Office, Safety 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.

Please note these upcoming deadlines to submit beam time requests, new proposals, or proposal extensions:

NOTE NEW DEADLINES Submit new X-ray/VUV proposals or extension requests by MAY 1, AUGUST 1, NOVEMBER 1.

  • Macromolecular Crystallography proposals/extension requests due April 1.
  • X-ray/VUV proposals/extension requests due May 1. 
  • X-ray/VUV beam time requests for October-January due August 1.

Accelerator Schedule (for staff)

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