Light-driven reactions are at the heart of human vision, photosynthesis and solar power generation. Seeing the very first step opens the door to observing chemical bonds forming and breaking.

New research shows that when a bunch of electrons zooms through the middle of a ring-shaped laser beam, the bunch can wind up with higher quality and generate a brighter X-ray beam.

Researchers investigate how much damage spreads through molecules struck by a pulse from LCLS.

This new technology could enable future insights into chemical and biological processes that occur in solution, such as vision, catalysis and photosynthesis.

An LCLS imaging technique reveals how a mosquito-borne bacterium deploys a toxin to kill mosquito larvae. Scientists hope to harness it to fight disease.

Hitting molecules with two photons of light at once set off unexpected processes that were captured in detail with SLAC’s X-ray laser. Scientists say this new approach should work for bigger and more complicated molecules, too, allowing new insights into...

Researchers have squeezed a high-energy electron beam into tight bundles using terahertz radiation, a promising advance in watching the ultrafast world of atoms unfold.

Siqi Li develops connections with people and concepts while working on new technologies for accelerators.

What they learned could lead to a better understanding of how ionizing radiation can damage material systems, including cells.

Called XLEAP, the new method will provide sharp views of electrons in chemical processes that take place in billionths of a billionth of a second and drive crucial aspects of life.

A better understanding of ‘checkpoint proteins,’ which protect cancer cells against immune system strikes, could lead to the development of more effective drugs.

Chemist Ben Ofori-Okai investigates what happens to matter under extreme conditions at microscopic scales to better understand its behavior at massive scales, such as what happens in the Earth’s core.