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A new generation of accelerators for research, medicine and more.

With electron beams a hundred times more intense than anything that came before.

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A look inside SLAC’s FACET-II test facility, where scientists use electron beams to advance revolutionary technologies that could make future particle accelerators much smaller and a lot more capable. (Jacqueline Ramseyer Orrell/SLAC National Accelerator Laboratory)

Recently upgraded and reopened to scientific users, FACET-II is the only facility in the world that provides high-energy electron beams for researching a vast array of revolutionary particle accelerator technologies that could make future accelerators 100 to 1,000 times smaller and a lot more capable.

With electron beams a hundred times more intense than anything that came before, FACET-II creates entirely new scientific opportunities, from designing and improving X-ray lasers and other light sources to opening new avenues in high energy physics and materials, biological and energy science.

FACET-II Fact Sheet

Find Out More About FACET-II

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FACET-II will produce beams of highly energetic electrons like its predecessor FACET, but with much better quality.
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FACET-II will push the boundaries of accelerator science and be a unique facility that will help keep the U.S. at the forefront of accelerator science.
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Researchers will use FACET-II for crucial developments before plasma accelerators can become a reality.