MODEL RELEASED. Particle accelerator. Technicians assembling a particle accelerator. This linear accelerator (linac) uses superconducting niobium radio- frequency oscillators (RFO) or resonators to propel electrons and their anti-matter equivalent, positrons. Alternating electric currents are pass- ed through the RFOs to create electric fields. The electrons & positrons are electrically charged and so move in response to the fields. The alternating currents are timed so that the particles are pull- ed along the linac, being accelerated each time they pass from one RFO to another. Electrons and positrons can be made to collide, destroying each other to produce energy.