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LCLS-II is a transformative upgrade 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. The upgrade empowers LCLS to produce X-ray pulses that are 10,000 times brighter than before and that arrive up to a million times per second.

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LCLS-II

Illustration of SLAC's cryoplant refrigerator.
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The mirrors only differ by one atom in flatness, from end to end.

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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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Finding ways to handle torrents of data from LSST and LCLS-II will also advance “exascale” computing.

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

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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...

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This movie introduces LCLS-II, a future light source at SLAC. It will generate over 8,000 times more light pulses per second than today’s most...
LCLS-II: The Next Leap for X-ray Science
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News Release

Upgrade will sharpen our view of nature’s atomic processes at work, aiding the development of a number of transformative technologies.

Illustration of an electron beam traveling through a niobium cavity.
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LCLS-II layout
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President Obama honored a SLAC and UCLA scientist for work that paved the way for the brightest sources of X-ray light on the planet.

Image - Claudio Pellegrini, right, talks with President Obama in the Oval Office on Tuesday. (Pete Souza/Official White House Photo)
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The fellowship will support their research on new capabilities for the lab's X-ray free-electron lasers and new telescope technology to look for signs of...

Zeeshan Ahmed and Agostino Marinelli, SLAC's 2015 Panofsky Fellows