Experiments with Antimatter: Investigating Positron Interactions with Atoms, Molecules and Materials

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We will construct a trap-based, positron beam line to be used to investigate the interactions of positrons with matter, namely atoms, molecules, and materials. Specific experimental goals include the observation of positron binding to matter and the investigation of the threshold behaviour of processes such as ionisation by positron impact and positronium formation, where correlation between the positron and bound electrons plays an important role. The beam line will also provide a unique facility for the investigation and characterisation of new materials.