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

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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%.

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Authors and Affiliations

  1. Istituto Nazionale di Fisica Nucleare, Via Celoria 16, 20133, Milan, Italy

    M. G. Giammarchi

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  1. M. G. Giammarchi
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(AEGIS Collaboration)

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Correspondence to M. G. Giammarchi.

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AEGIS Collaboration: 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.

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Giammarchi, M.G., (AEGIS Collaboration). Efficient Rydberg positronium laser excitation for antihydrogen production in a magnetic field. Hyperfine Interact 193, 321–327 (2009). https://doi.org/10.1007/s10751-009-0018-5

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  • DOI: https://doi.org/10.1007/s10751-009-0018-5

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