Positron injector for accumulator LEPTA

An injector of the monochromatic positrons for the accumulator LEPTA is being tested at JINR. The positron injector is based on a 22Na radioactive source. Positrons from the source are moderated in a solid target. Solid neon is chosen as moderator. For these goals the cryogenic system of the source and neon feed line have been constructed. The low energy positron registration method has been tuned. The first experiments with the solid moderator have been performed. A slow positron beam at the average energy 1.2 eV and width of the spectrum 1 eV has been obtained