LEPTA project: generation and study of positronium in directed fluxes

The goal of the low energy particle toroidal accumulator (LEPTA) project is the construction of a small positron storage ring with electron cooling of positrons circulating in the ring. Such a cooling scheme enables it to generate positronium by the recombination of positrons with cooling electrons inside the cooling section of the ring. LEPTA is expected to produce Ps atoms at a rate of up to 104 atoms/s, with very small angular (of order of 1 mrad) and momentum (Δp/p less than 10-3) spreads. The description of the LEPTA facility and research program with positronium-in-flight are presented in the report