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SLAC National Accelerator Laboratory
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      Learn about our science, people, facilities and partners. Discover our history and vision for the future.

    • OUR STORY
      • Mission, vision, values
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      • SLAC at a glance
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    Who we are

    We explore radically new ideas with an entrepreneurial mindset.

    Science and User Support Building to the left and Arrillaga Science Center building to the right from above the Main Quad at SLAC's campus.
    • Research

      Get an overview of research at SLAC: X-ray and ultrafast science, particle and astrophysics, cosmology, particle accelerators, biology, energy and technology.

    • X-ray and Ultrafast science icon X-ray & ultrafast science

      Revealing nature’s fastest processes with X-rays, lasers and electrons

    • Physics of the universe science icon Physics of the universe

      Studying the particles and forces that knit the cosmos together

    • Advanced Accelerators science icon Advanced accelerators

      Building smaller, faster, more powerful accelerators for all

    • Science of life science icon Science of life

      Understanding the machinery of life at its most basic level

    • New technologies science icon New technologies

      Inventing new tools for science and society

    • Energy sciences science icon Energy sciences

      Breaking new ground in securing abundant, affordable and reliable energy.

    Spotlight

    SLAC science explained

    Cut through the jargon while exploring our research.

    A girl experiences static electricity from a Van de Graaff generator at a outdoor SLAC STEM Community Day event, making her hair stand on end.
    • Facilities & Centers

      Learn more about the places where science happens at SLAC: our major facilities, institutes and centers.

    • SCIENTIFIC FACILITIES
      • LCLS website

        Linac Coherent Light Source

      • SSRL website

        Stanford Synchrotron Radiation Lightsource

      • FACET-II website

        Facility for Advanced Accelerator Experimental Tests

      • CryoEM website

        Cryogenic Electron Microscopy

    • JOINT INSTITUTES & CENTERS
      • SIMES website

        Stanford Institute for Materials & Energy Science

      • KIPAC website

        Kavli Institute for Particle Astrophysics & Cosmology

      • PULSE website

        Stanford PULSE Institute

      • SUNCAT website

        Center for Interface Science & Catalysis

      • SLAC-Stanford Battery Center

    NSF-DOE Vera C. Rubin Observatory LSST

    SLAC & Stanford build the world’s largest digital camera for the Legacy Survey of Space and Time (LSST).

    A drone photo of Rubin Observatory while taking pictures during the First Look observing campaign
    • Work with Us

      Find a career, partner with us or apply to use our tools and facilities.

    • PARTNER WITH US
      • For industry partners
      • Research partnerships & tech transfer
      • Technology Innovation
    • CAREERS AT SLAC
      • Job openings
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      • Life at SLAC
    • USE OUR FACILITIES

      Apply to become a user of our scientific research facilities and instruments.

    • COMING TO SLAC
    • BECOME A SUPPLIER

    Careers at SLAC

    Join our united workforce.

    SLAC staff in main quad
    • News & Events

      Get the latest news about the lab, our science and discoveries. Explore SLAC events and learn how to participate.

    • NEWS CENTER
      • News archive
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    • SLAC EVENTS
      • Public lectures
      • Scientific seminars
      • Community events
    • SYMMETRY MAGAZINE

      This joint publication of SLAC and Fermilab is your view into the world of particle physics.

    • EDUCATIONAL PROGRAMS
      • Educational tours
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    Upcoming

    SLAC on Tap: Night of the Dark Matter

    Wednesday, October 28, 5:30pm

    SLAC on Tap
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Past Event
Community Day

STEM Community Day 2025

Join us for science fun at STEM Community Day on October 25 at SLAC!

Date Saturday, October 25, 2025
1:00 p.m.  –  5:00 p.m.  PT
Location SLAC National Accelerator Laboratory, Science and User Support Building, Kavli …
A child looks at a light bulb while wearing glasses with diffraction lenses
Multimedia

How NSF-DOE Vera C. Rubin Observatory maps the universe every night

This video breaks down how Rubin will run the Legacy Survey of Space and Time (LSST) and build a 10-year time lapse of the...

April 23, 2026  ·  1 min read
Rubin Observatory with the night sky and Milky Way in the background
News Brief

Groundbreaking instrument back online, marking a key milestone in high-energy upgrade to SLAC’s X-ray laser

The X-ray Pump Probe instrument is returning to normal operations this spring, anticipating a major capability boost when the high-energy beam comes online. 

April 29, 2026  ·  9 min read
Person in teal jacket leaning over perforated metal table, holding green panel near robotic arm in industrial laboratory setting.
News Brief
VIA Rubin Observatory

NSF–DOE Vera C. Rubin Observatory Founding Director Tony Tyson included in 2026 TIME100

The long-time collaborator of SLAC joins the list that recognizes the impact, innovation and achievement of the world’s most influential individuals.

April 30, 2026
Tony Tyson photo with 2026 Time100 frame
News Brief
VIA Fermilab

Fermilab completes its part in upgrading world’s most powerful X-ray laser

The lab sent its final contribution to SLAC for the high-energy upgrade of the superconducting accelerator of the LCLS X-ray laser.

May 5, 2026
Fermilab Director Norbert Holtkamp signs a cryomodule while SLAC Director John Sarrao looks on.
Public tours

Educational tours

SLAC National Accelerator Laboratory offers free educational tours (transportation not included). Tours last approximately 90 minutes, and tour locations may vary according to site availability and group interests.

Public tour group at LCLS Far Experimental Hall
Public Lecture Poster

How scientists are building the AI-powered laboratory

May 12, 2026
Poster for public lecture titled How scientists are building the AI-powered laboratory
Feature

Lynbrook High claims 2021 SLAC Regional Science Bowl victory

The pandemic forced major changes to the format, but 30 teams from 22 schools still came together online to vie for a slot at...

February 11, 2021  ·  3 min read
A screenshot of competitors and volunteers in a video conference call.
News Release

Theorists Reveal Path to True Muonium

True muonium, a long-theorized but never-seen atom, might be observed in future experiments, thanks to recent theoretical work by researchers at the Department of...

May 29, 2009
muonium
News Release

SLAC’s superconducting X-ray laser reaches operating temperature colder than outer space

The facility, LCLS-II, will soon sharpen our view of how nature works on ultrasmall, ultrafast scales, impacting everything from quantum devices to clean energy.

May 10, 2022  ·  6 min read
LCLS-II cooldown
News Release

SLAC and Stanford Open One of World's Most Advanced Facilities for Cryo-EM

The new facility provides revolutionary tools for exploring tiny biological machines, from viral particles to the interior of the cell.

April 30, 2018
SLAC-Stanford Cryo-EM Facility
Our Story

About SLAC

As one of 17 Department of Energy national labs, SLAC pushes the frontiers of human knowledge and drives discoveries that benefit humankind. We invent...
SLAC main quad, with the Science and User Support Building and the Arrillaga Science Center
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SLAC National Accelerator Laboratory 
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Menlo Park, CA 94025-7015  
650.926.3300

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We explore how the universe works at the biggest, smallest and fastest scales and invent powerful tools used by scientists around the globe.

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