A new electron gun, designed and built at Berkeley Lab to supply electrons for a next-gen X-ray laser, just fired its first electrons. The X-ray laser is part of the LCLS-II project, which is an upgrade of SLAC National Accelerator Laboratory’s Linac Coherent Light Source X-ray laser. https://newscenter.lbl.gov/2019/05/30/berkeley-lab-built-electron-gun-fires-up-for-lcls-ii-x-ray-laser-project/