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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)
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A ‘nonlinear’ phenomenon that seemingly turns materials transparent is seen for the first time in X-rays at SLAC’s Linac Coherent Light Source.

Illustration of an LCLS experiment in which a sample seemed to disapper
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The mirrors only differ by one atom in flatness, from end to end.

Video
Time-lapse video of MFX construction from July 2015 to January 2016.
LCLS MFX Construction Timelapse
Video
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The new MFX station expands the X-ray laser’s capability and flexibility for biological studies, which are increasingly in demand at SLAC's Linac Coherent Light...

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Four Stanford students receive funding for work on novel accelerators and beams for SLAC's X-ray laser.

Animation

The side-to-side motion of electrons in a beam can be circular, elliptical, or linear, depending on the position of the Delta undulator's magnet rows...

A graphic of the Delta undulator showing circular, elliptical and linear polarization of light.
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A new device at the Department of Energy’s SLAC National Accelerator Laboratory allows researchers to explore the properties and dynamics of molecules with circularly...

Electrons spiral through the Delta undulator.
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Manipulating electron beams of X-ray lasers with regular laser light could potentially open up new scientific avenues.

Beam of electrons illustration.
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Taken at SLAC, microscopic footage of exploding liquids will give researchers more control over experiments at X-ray lasers.

News Release

High-speed X-ray camera reveals ultrafast atomic motions at the root of organisms’ ability to turn light into biological function.

a protein from photosynthetic bacteria
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The lab’s signature particle highway prepares to enter another era of transformative science as the home of the LCLS-II X-ray laser.

SLAC linear accelerator building at sunset
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Using data from the world’s most powerful X-ray laser at the Department of Energy's SLAC National Accelerator Laboratory, an international team of scientists has...