Conceptual design of the low energy positron storage ring

A method for the generation of intense antihydrogen and positronium streams using a low energy positron storage ring is considered. A longitudinal magnetic field for the focusing system and electron cooling of the positrons are essential features of the ring. The general limitations of the storage ring parameters are determined by the relation between scattering and cooling processes. The positron beam energy is determined by physics processes which are to be studied; it lies in the range from 5 up to 30 keV. The positron lifetime is about 100 s at a vacuum pressure of 100 pTorr. The generation of slow antihydrogen atoms by using electrostatic deceleration of positrons and antiprotons is described. The lowest antihydrogen energy in such a scheme is about a few eV and the generation rate is about 1 atom per second. The positron storage ring design is described. The general parameters of the positron storage ring, which is under design in JINR, are presented. The main purpose of the proposed machine construction is the performance of experimental studies of intense positron beam storing, electron cooling and deceleration in a straight section.