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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.
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.
news collection

An upgrade to SLAC’s renowned Linac Coherent Light Source will allow it to deliver X-ray laser beams that are 10,000 times brighter with pulses that arrive up to a million times per second.

collage of LCLS-II milestones
News Release

After decades of effort, scientists have finally seen the process by which nature creates the oxygen we breathe using SLAC’s X-ray laser.

Photosystem II
Feature

Once built, the system could produce fast X-ray pulses ten times more powerful than ever before.

illustration of an electron beam traveling through a niobium cavity – a key component of SLAC’s future LCLS-II X-ray laser.
Video
After more than a decade, LCLS was upgraded to generate even more powerful X-ray laser beams. With the LCLS-II upgrade, LCLS is around 10,000...
The creation of the world's brightest X-ray
Video
Feature

A machine learning algorithm automatically extracts information to speed up – and extend – the study of materials with X-ray pulse pairs.

A pattern of red and yellow dots surrounded by a ring of blue dots on a black background.
Feature

The Stanford Board of Trustees held its first meeting of the 2022-23 academic year Oct. 17-18. Trustees toured the SLAC National Accelerator Laboratory and...

Aerial photo of SLAC research yard
Illustration
When light drives electron transfer in a molecular complex, the surrounding solvent molecules also rapidly move.
When light drives electron transfer in a molecular complex, the surrounding solvent molecules also rapidly move.
Illustration

Scientists use a series of magnets to transform an electron bunch into a narrow current spike which then produces a very intense attosecond X-ray...

XLEAP illustration
Photograph

The first of 37 cryomodules for LCLS-II is moved off of its truck after being shipped from Fermilab.   All the cryomodules were delivered...

Cryomodule lifted from truck
Photograph

Drone photo of the team working on LCLS-II cryoplant.

Cryoplant team
Photograph

Dominique White takes a look at the last cryomodule for LCLS-II delivered from Fermi National Accelerator Laboratory.

Dominique White takes a look at the last cryomodule for LCLS-II delivered from Fermi National Accelerator Laboratory.