Efficient Rydberg positronium laser excitation for antihydrogen production in a magnetic field

摘要

Antihydrogen production by charge exchange reaction between positron-ium (Ps) and antiprotons requires an efficient excitation of Ps atoms up to high-nlevels (Rydberg levels). We propose a two-step laser light excitation, the first fromground to n = 3 and the second from this level to a Rydberg level n > 15. In thisstudy it is assumed that a Ps cloud is produced by positrons hitting a target converterlocated in a Penning-Malmberg trap within a uniform 1 T magnetic field. Wemodel the optical transition structure by taking into account Doppler and motionalStark effects. The predicted efficiency for population deposition in high n states isof 30%.