sentence: Electrons are injected into a linear accelerator.
sentences_after: The fast-moving electrons then pass through a wiggler which produces a bright laser light beam. By reusing the electrons and most of their energy, the free-electron laser requires less electricity to operate. Cornell University is now trying to build one to produce X-rays.
concept_name: electron
headings: Thomas Jefferson National Accelerator Facility Free-electron laser
categories: Nuclear physics United States Department of Energy Buildings and structures in Virginia Newport News, Virginia