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LCLS-II will be a transformative tool for energy science, qualitatively changing the way that X-ray imaging, scattering and spectroscopy can be used to study how natural and artificial systems function. It will produce X-ray pulses that are 10,000 times brighter, on average, than those of LCLS and that arrive up to a million times per second.

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LCLS-II

Illustration of SLAC's cryoplant refrigerator.

Upcoming Event

Double your pressure, double your fun! Join us for SLAC on Tap on May 9, when SLAC scientist and rock star Arianna Gleason will...

SLAC on tap promo with Arianna Gleason
May 09
News Feature

Following the NIF ignition demonstrations, the prospect of developing a fusion energy source using lasers looks brighter than ever. 

Illustration featuring three SLAC scientists Alan Fry, Arianna Gleason, and Siegfried Glenzer.
News Feature

Teams at SLAC installed new experimental hutches with cutting-edge instruments that will harness the upgraded facility’s new capabilities and expand the breadth of research...

SLAC's linac at sunrise, looking east.
Video

Secretary of Energy Jennifer M. Granholm delivered this speech on the successful completion of the world’s most powerful X-ray laser at SLAC National Accelerator...

Secretary of Energy Jennifer M. Granholm delivering a speech at SLAC
Video

LCLS is the world’s first hard X-ray free-electron laser, open to experiments by scientists from across the globe.

New undulator hall
News Feature

The Secretary celebrated LCLS-II first light with 600 SLAC staff and collaborators Oct. 26.

Secretary of Energy Jennifer M. Granholm and SLAC staff celebrate LCLS-II first light
News Feature

The award recognizes Driver’s contribution toward attosecond X-ray capabilities.

A portrait of Taran Driver.
Press Release

With up to a million X-ray flashes per second, 8,000 times more than its predecessor, it transforms the ability of scientists to explore atomic-scale...

LCLS-II first light
Photograph
SLAC staff gather in the accelerator control room to celebrate first light produced by the LCLS-II project’s pioneering superconducting accelerator.
First light celebration
Illustration

SLAC’s newly upgraded Linac Coherent Light Source (LCLS) X-ray free-electron laser (XFEL) successfully produced its first X-rays, creating unparalleled capabilities that will usher in...

LCLS-II first light
News Feature

They used synthetic diamond crystals as mirrors to make X-ray pulses run laps inside a vacuum chamber, demonstrating a key process needed for future...

Two scientists in a control room full of computer monitors that allow them to adjust diamond mirrors in their CBXFEL experiment
News Feature

The facility is now one step away from releasing an unprecedented stream of ultra-bright X-rays.

This is a graphic representation of electron bunches travelling through SLAC's linear accelerator.