Efficient Rydberg positronium laser excitation for antihydrogen production in a magnetic field
Antihydrogen production by charge exchange reaction between positronium (Ps) and antiprotons requires an efficient excitation of Ps atoms up to high-n levels (Rydberg levels). We propose a two-step laser light excitation, the first from ground to n = 3 and the second from this level to a Rydberg level n > 15. In this study it is assumed that a Ps cloud is produced by positrons hitting a target converter located in a Penning-Malmberg trap within a uniform ~ 1 T magnetic field. We model the optical transition structure by taking into account Doppler and motional Stark effects. The predicted efficiency for population deposition in high n states is of ~30%.
KeywordsRydberg positronium laser excitation Antihydrogen production Magnetic fields
- 7.Bonomi, G.: In: LEAP 2008 - International Conference on Low Energy Antiproton Physics, 16–19 Sept 2008, Vienna, Austria (2008)Google Scholar
- 11.Boyd, R.W.: Nonlinear Optics, 2nd edn. Academic Press (2003)Google Scholar
- 19.Gallagher, T.F.: Rydberg Atoms. Cambridge University Press, Cambridge (2005)Google Scholar
- 20.Meystre, P., Sargent, M.: Elements of Quantum Optics, 3rd edn. Springer, New York (2005)Google Scholar