collage of LCLS-II milestones
LCLS-II news collection

Building the world’s most powerful X-ray laser

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

Hundreds of scientists use LCLS each year to catch a glimpse of nature’s fundamental processes. The unique X-ray microscope uses some of the brightest, fastest X-ray pulses ever made to provide unprecedented details of the atomic world.

LCLS-II allows researchers to make observations over a wider energy range, capture detailed snapshots of rapid processes, probe delicate samples and gather more data in less time. Powered by a superconducting accelerator, LCLS-II further sharpens our view of how nature works at the atomic scale and advances transformative technologies of the future, including novel electronics, life-saving drugs and innovative energy solutions.

 

Video
LCLS-II: The next leap for X-ray science

Latest LCLS-II 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

Water is all around us, yet its surface layer is surprisingly hard to study. Experiments at SLAC’s X-ray laser are bringing it into focus.

Two water strider insects with long, thin legs cast shadows on dark blue water surface with blurred background reflections.

Experiments running at these higher pulse rates will allow scientists to capture ultrafast processes with greater precision, collect data more efficiently and explore phenomena that were previously out of reach.

lcls ii milestone

The SLAC team is developing digital twins – powered by AI and high-performance computing – to help quickly shape high-quality particle beams for the lab’s X-ray and ultrafast facilities.

hand pointing to digital twin

After a major upgrade, SLAC's X-ray free-electron laser is 10,000 times brighter and thousands of times faster. Now, researchers are using LCLS to observe electrons in real time as they move across molecules.

Detail of the TMO hutch at SLAC's X-ray laser

Researchers used LCLS to capture the ultrafast motion of electrons inside molecules – at scales never before possible. 

Complex scientific machinery with metal components

Water is all around us, yet its surface layer is surprisingly hard to study. Experiments at SLAC’s X-ray laser are bringing it into focus.

Two water strider insects with long, thin legs cast shadows on dark blue water surface with blurred background reflections.

Experiments running at these higher pulse rates will allow scientists to capture ultrafast processes with greater precision, collect data more efficiently and explore phenomena that were previously out of reach.

lcls ii milestone

The SLAC team is developing digital twins – powered by AI and high-performance computing – to help quickly shape high-quality particle beams for the lab’s X-ray and ultrafast facilities.

hand pointing to digital twin

After a major upgrade, SLAC's X-ray free-electron laser is 10,000 times brighter and thousands of times faster. Now, researchers are using LCLS to observe electrons in real time as they move across molecules.

Detail of the TMO hutch at SLAC's X-ray laser

Researchers used LCLS to capture the ultrafast motion of electrons inside molecules – at scales never before possible. 

Complex scientific machinery with metal components

They used SLAC’s ultrafast X-ray laser to follow the impact of a single electron moving within a molecule during an entire chemical reaction.

An illustration of X-rays scattering off the valence electrons surrounding ammonia molecules and getting captured on a detector.

With a suite of reimagined instruments, researchers take up scientific inquiries that were out of reach just one year ago. 

Large metallic machine in a lab, featuring valves, circular bolts, and digital displays with surrounding wires and tubing.

Researchers used the upgraded LCLS to better understand what makes Xanthone – a powerful photocatalyst used in cancer therapies –  so efficient.  

close up of instrumentation in the TMO hutch

Now 10,000 times brighter and thousands of times faster, LCLS sheds light on the formation of free radicals in nature. 

a closeup of the target chamber of the RIXS experimental hutch

Shweta Saraf and her team work to ensure the LCLS beamline runs without interruption. 

A woman stands next to a large blue server rack filled with electronic control units, wiring, and monitoring equipment. She is smiling at the camera while using a stylus to interact with a touchscreen interface on one of the devices.

LCLS-II explained

The upgrade to the Linac Coherent Light Source, 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. Learn what an XFEL does and about SLAC’s journey to upgrading its Linac Coherent Light Source.

X-ray free-electron lasers are like X-ray microscopes, allowing scientists to spot the intricate movements of atoms and molecules and capture their motion in snapshots that can be strung together into “molecular movies” of materials, chemistry and biology in action.

Molecular movie filmstrip.

SLAC’s renowned Linac Coherent Light Source is getting a major upgrade that will significantly boost its power and capacity. LCLS-II will further sharpen our view of how nature works at the atomic scale and help advance transformative technologies of the future, including novel electronics, life-saving drugs and innovative energy solutions.

Aerial view of linac and cryoplant at SLAC

LCLS was designed to generate X-ray pulses a billion times brighter than anything that had come before. It was the first machine to produce ultrafast high energy X-ray laser pulses. Since it turned on in April 2009, SLAC has been the birthplace of a host of scientific firsts. LCLS-II will bump X-ray science to new heights.

Undulator Hall
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Building a next-gen X-ray laser

Building a Next-Gen X-ray Laser
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Collaboration

Partnerships

LCLS-II was developed and built in collaboration with four other DOE national laboratories: ArgonneBerkeley LabFermilabJefferson Lab, and Cornell University.

  • Argonne National Laboratory
  • Berkeley Lab
  • Fermilab
  • Jefferson Lab
  • Cornell University

International partners

  • DESY
  • European XFEL
  • CEA Saclay
  • CERN

 

 

For questions or comments, contact the SLAC Office of Communications at communications@slac.stanford.edu.


About SLAC

SLAC National Accelerator Laboratory explores how the universe works at the biggest, smallest and fastest scales and invents powerful tools used by researchers around the globe. As world leaders in ultrafast science and bold explorers of the physics of the universe, we forge new ground in understanding our origins and building a healthier and more sustainable future. Our discovery and innovation help develop new materials and chemical processes and open unprecedented views of the cosmos and life’s most delicate machinery. Building on more than 60 years of visionary research, we help shape the future by advancing areas such as quantum technology, scientific computing and the development of next-generation accelerators.

SLAC is operated by Stanford University for the U.S. Department of Energy’s Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time.