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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.

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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.

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    • 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

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

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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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(1919-2007)

Wolfgang (Pief) K. H. Panofsky

Lab Director 1961-1984

Wolfgang K. H. “Pief” Panofsky, a renowned physicist and passionate arms control advocate, was SLAC’s first director. Panofsky pressed the case for basic accelerator...

Portrait of W. K. H. Panofsky at SLAC taken by Leo Holub 1984.
(1931-2018)

Burton Richter

Lab Director 1984-1999

The burst of scientific activity that began with the discovery of the J/psi particle in 1974 is known to particle physicists as the “November...

Burton Richter
Deputy Director Emeritus

Gregory A. Loew

Deputy director 2001-2005

Gregory Loew  spent his entire 50-year career at SLAC, starting in 1958 when it was still called “Project M.” He developed the design of...

Gregory A. Loew

Rich Poliak

Interim – Contractor Assurance & Contract Management Director
Rich Poliak
SLAC EXPERTS

Simon R. Bare

Co-Director of Chemistry & Catalysis Division, Stanford Synchrotron Radiation Lightsource (SSRL); Distinguished Staff Scientist, SLAC National Accelerator Laboratory (SLAC)

Areas of research: X-ray absorption spectroscopy, operando catalyst characterization, catalyst structure-property relationships, new methods of catalyst characterization

Portrait of Simon R Bare

Catherine Zandonella

News Editor

News Editor

Catherine outdoors
news collection

Energy and sustainability

Explore how SLAC advances energy research, partnering with Stanford University, the U.S. Department of Energy and industry, to help create a more reliable, affordable and sustainable energy future.

SLAC scientist working on batteries at scale in the SLAC–Stanford Battery Center in the Arrillaga Science Center

Hillary Smith

Media Relations Lead

Hillary joined SLAC in July 2026 as the lab’s media relations lead. She works to increase the lab’s visibility among the public and other...

Portrait of Hillary Smith
news collection
News Collection

LCLS-II High Energy Upgrade

Now, we’re turning up the energy. The high-energy upgrade to LCLS will extend its ultrafast megahertz capability into the “hard,” or high-energy, X-ray regime.   

The first of 23 cryomodules is delivered to SLAC for the high energy upgrade to the Linac Coherent Light Source
news collection

Dark matter

Dark matter makes up about 85% of all matter in the universe, yet its true identity remains one of the biggest cosmological mysteries. At SLAC, researchers are searching high and low to find answers.

Formation of dark matter structures.

Kathryn Jepsen

Editor-in-Chief, Symmetry Magazine

Kathryn is editor-in-chief of Symmetry Magazine, a publication about particle physics and astrophysics. She has a master’s degree in journalism with a focus...

Headshot of Kathryn Jepsen

Paul McIntyre

Associate Lab Director, Stanford Synchrotron Radiation Lightsource (SSRL) Directorate
Portrait of Paul McIntyre, associate lab director, Stanford Synchrotron Radiation Lightsource (SSRL) Directorate
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Menlo Park, CA 94025-7015  
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