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%.
Efficient Rydberg positronium laser excitation for antihydrogen production in a magnetic field / M.G. Giammarchi, A.S. Belov, G. Bonomi, I. Boscolo, N. Brambilla, R.S. Brusa, V.M. Byakov, L. Cabaret, C. Canali, C. Carraro, F. Castelli, S. Cialdi, M. de Combarieu, D. Comparat, G. Consolati, N. Djourelov, M. Doser, G. Drobychev, A. Dupasquier, D. Fabris, R. Ferragut, G. Ferrari, A. Fischer, A. Fontana, P. Forget, L. Formaro, M. Lunardon, A. Gervasini, S.N. Gninenko, G. Gribakin, R. Heyne, A. Kellerbauer, D. Krasnicky, V. Lagomarsino, G. Manuzio, S. Mariazzi, V.A. Matveev, S. Moretto, C. Morhard, G. Nebbia, P. Nedelec, M.K. Oberthaler, P. Pari, V. Petracek, M. Prevedelli, I.Y. Al Qaradawi, F. Quasso, O. Rohne, S. Pesente, A. Rotondi, S. Stapnes, D. Sillou, S.V. Stepanov, H.H. Stroke, G. Testera, G.M. Tino, A. Vairo, G. Viesti, F. Villa, H. Walters, U. Warring, S. Zavatarelli, A. Zenoni, D.S. Zvezhinskij. - In: HYPERFINE INTERACTIONS. - ISSN 0304-3843. - 193:1-3(2009), pp. 321-327. [10.1007/s10751-009-0018-5]
Efficient Rydberg positronium laser excitation for antihydrogen production in a magnetic field
I. Boscolo;N. Brambilla;F. Castelli;S. Cialdi;A. Gervasini;F. Villa;
2009
Abstract
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%.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
