SSRL Experimental Run Schedule

The FY2019 SPEAR Operating Schedule is posted for users to review plans for operations, maintenance/accelerator physics, holidays and other down times next year. The FY2019 user run officially resumes the week of October 29th, and the schedule for most beam lines October 2018-January 2019 is now available through the user portal. Log into the user portal to view beam time assignments and submit feedback from your beam time experiences.
To request X-ray/VUV beam time for the February-April 2019 cycle, submt beam time requests through the user portal by November 3. Submit macromolecular crystallography beam time requests by January 14 for March-May scheduling.
NOTESSRL beam lines will shutdown during these scheduled breaks in FY2019:  November 21 (4 pm)-November 23 (~11 am), December 21-January 8, February 25-March 5, May 28-June 4, and July 29-late October 2019.

X-ray 2018-2019 

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

VUV 2018-2019

(BL5-4, 8-2, 10-1, 13-2/3)  

Macromolecular Crystallography 2018-2019

(BL7-1, 9-2, 12-2, 14-1)
see also: Support Staff Schedule

NEW FY 2019 SPEAR Operating Schedule


see Schedule Archive

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). Other factors are availability of both equipment and beam line staff. 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 one or two experiments per research group per run cycle or run year, depending on the specific beam line availability.


Prepare to Visit SSRLContact the designated 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.

All users must be registered on the SSRL/LCLS user portal and be listed on a scheduled proposal to access SLAC (review procedures).

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

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.

  • X-ray/VUV proposals/extension requests due November 1. 
  • X-ray/VUV beam time requests for October-January due November 3.
  • Macromolecular Crystallography proposals/extension requests due December 1.


Accelerator Schedule (for staff)

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