A powerful X-ray laser pulse from SLAC National Accelerator Laboratory’s Linac Coherent Light Source comes up from the lower-left corner (shown as green) and hits a neon atom (center). This intense incoming light energizes an electron from an inner orbit (or shell) closest to the neon nucleus (center, brown), knocking it totally out of the atom (upper-left, foreground). In some cases, an outer electron will drop down into the vacated inner orbit (orange starburst near the nucleus) and release a short-wavelength, high-energy (i.e. “hard”) X-ray photon of a specific wavelength (energy/color) (shown as yellow light heading out from the atom to the upper right along with the larger, green LCLS light).
Scientists working at the U.S. Department of Energy’s (DOE) SLAC National Accelerator Laboratory have created the shortest, purest X-ray laser pulses ever achieved, fulfilling a 45-year-old prediction and opening the door to a new range of scientific discovery.
The researchers, reporting in Nature, aimed SLAC’s Linac Coherent Light Source (LCLS) at a capsule of neon gas, setting off an avalanche of X-ray emissions to create the world’s first “atomic X-ray laser.”
“X-rays give us a penetrating view into the world of atoms and molecules,” said physicist Nina Rohringer, who led the research. A group leader at the Max Planck Society’s Advanced Study Group in Hamburg, Germany, Rohringer collaborated with researchers from SLAC, DOE’s Lawrence Livermore National Laboratory and Colorado State University…