Welcome to the SSRL User Research Site

Responsive Design User Portal

An electrical incident occurred on the SLAC site in late December.  A site-wide safety stand down ensued to review and improve operating procedures across the site - with particular emphasis on hazardous energy (CoHE) protocols and lock-out-tag-out (LOTO) restrictions. These restrictions applied to restarting the injector and SPEAR3 for SSRL operations. The situation was further compounded by a SPEAR3 injector transformer failure on January 11.  New procedures had to be approved by the Department of Energy before any CoHE or LOTO work could be done. Work on the transformer has begun, and we hope to be able to restart SSRL operations in early July. We realize that this unexpected outage has had significant impact on our user community, and we sincerely appreciate your patience.


SSRL Celebrates 50th Anniversary on April 20, 2023

SSRL SPEAR/Beam  Line Schedules

Submit proposals and beam time requests (BTRs) by posted deadlines. Contact the User Office if you need assistance.

  • LODGING:  Reserve rooms at the GUEST HOUSE using the SLAC User Reservations Portal to access user rooms and rates (specify SSRL, proposal number and spokesperson when making reservations through the user reservations portal).

  • FOOD:  Visit the SLACafé or Verve coffee kiosk Monday–Friday ~7 am–2 pm. Other FOOD OPTIONS include restaurants that deliver to SLAC Main Gate/Guest House.

  • NEWS:  Stay informed by subscribing to SSRL Headline News (send e-mail to with "subscribe ssrl-headlines" in the body).

  • WORK SAFELY:  Be aware and exercise caution when visiting SLAC, particularly during construction. Contact Security if help is needed or to report any problems or suspicious activity: 650-926-2551. For EMERGENCIES, CALL 911 OR 5555.

Planning Ahead Getting Beam Time


SSRL Visitor or Tour Requests - contact SSRL Administration, Building Manager and SLAC Security.



Discover our worldwide collaboration and what we do for scientist, engineers, technicians, students...

SSRL is a member of Lightsources.org, a global resource for news and science highlights, facility capabilities and contacts, conferences and events, and job opportuniites as well as photos, videos, education and outreach resources for international light source user facilities. Subscribe to keep up with the latest news and developments.

Society for Science at User Facilities (SSURF)

The Society for Science at User Research Facilities (SSURF) is a non-profit organization working to advance awareness of user facility research. SSURF replaces the National User Facility Organization (NUFO) which represented the interests of scientists who conduct research at national scientific user facilities.

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