A good source of ions

This photo shows the ground electrode of the negative-hydrogen-ion source for the Project X Injector Experiment. The source, manufactured by D-Pace Inc. and licensed from TRIUMF laboratory in Vancouver, Canada, will be installed next month at Fermilab’s Cryomodule Test Facility. Once operating, it will produce ionized hydrogen atoms in its plasma chamber (not shown) and extract them through the aperture (into the plane of the picture) to form particle beams. Photo: Lionel Prost, AD