Epic Beam

The older low energy positron beamline of the lab operating in the 0-20 keV energy range. It is a continuous beam with a secondary electron tagging system and time buncher and is equipped with a positron annihilation lifetime spectrometer, high purity Ge detector for Doppler broadening spectroscopy, and fast sample changeover capabilities for material science studies. In addition, this beamline is also used to supply tagged positrons for the EPIC experiment, searching for invisible decays of positronium, and was used in recent positronium laser spectroscopy measurements.