SLAC's newest laser works best when it's colder than outer space

After nearly a decade in development, the second iteration of the Linac Coherent Light Source (LCLS) at the DoE's Stanford Linear Accelerator Center (SLAC) is nearly ready to start throwing photons harder than ever before. Dubbed the LCLS-II, this billion-dollar superconducting particle accelerator upgrade will produce X-rays 10,000 times brighter than those of its predecessor at a world record rate of 1 million pulses per second -- all while working at a frosty negative 456 degrees Fahrenheit. ...