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The Linac Coherent Light Source at SLAC, the world’s first hard X-ray free-electron laser, takes X-ray snapshots of atoms and molecules at work, revealing fundamental processes in materials, technology and living things.

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Rooftop view of Linac Coherent Light Source (LCLS)
Illustration

A half-mile-long stretch of tunnel in Menlo Park, California is now colder than most of the universe.

LCLS-II cooldown
Animation

The linac is equipped with two world-class helium cryoplants.

Cryoplant flow animation
Video

SLAC Recent History (1990s-today SLAC Linac Coherent Light Source) – The creation of a powerful X-ray laser. 

SLAC Recent History: The creation of a powerful X-ray laser
Video
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Researchers discover that a spot of molecular glue and a timely twist help a bacterial enzyme convert carbon dioxide into carbon compounds 20 times...

An illustration shows the pocket in an enzyme called ECR where the carbon fixing reaction takes place.
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The leaders of SLAC's Technology Innovation Directorate discuss how their group supports the lab's most innovative projects.

TID senior managers
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SLAC’s Matt Garrett and Susan Simpkins talk about tech transfer that brings innovations from the national lab to the people, including advances for medical...

Tech Transfer
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A laser compressing an aluminum crystal provides a clearer view of a material’s plastic deformation, potentially leading to the design of stronger nuclear fusion...

an abstract illustration of rippling waves made of shining dots
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Researchers mimicked these extreme impacts in the lab and discovered new details about how they transform minerals in Earth’s crust.

meteor
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X-ray laser experiments show that intense light distorts the structure of a thermoelectric material in a unique way, opening a new avenue for controlling...

Illustration shows two ball-and-stick molecules in pink and red separated by a blurred streak representing how the first structure is slightly deformed into the second.
Illustration
Illustration shows two ball-and-stick molecules in pink and red separated by a blurred streak representing how the first structure is slightly deformed into the second.
Video

Public lecture presented by Ben Ofori-Okai

Public lecture poster for Getting to the Core of Earth’s Magnetic Field
Video
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Less than a millionth of a billionth of a second long, attosecond X-ray pulses allow researchers to peer deep inside molecules and follow electrons...

Illustration of attosecond coherent electron motions.