Data di Pubblicazione:
2011
Citazione:
Efficient two-step Positronium laser excitation to Rydberg levels / S. Cialdi, I. Boscolo, F. Castelli, F. Villa, G. Ferrari, M. G. Giammarchi. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - ISSN 0168-583X. - 269:13(2011 Jul 01), pp. 1527-1533. [10.1016/j.nimb.2011.04.108]
Abstract:
Antihydrogen production by charge exchange reaction between Positronium atoms and antiprotons requires efficient excitation of Positronium atoms up to high-n levels (Rydberg levels). A two-step optical excitation, the first from ground to n=3 and the second from this level to a Rydberg level, is proposed and a suitable laser system is discussed. The requirements on the energy and bandwidth of the excitation laser suggest the use of optical parametric generation technology for both wavelengths. The laser system is composed by two subsystems: one for the generation of 205 nm radiation and the other for the generation of 1670 nm radiation. We have separately developed and tested the laser sources and results are here presented.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Positronium; Rydberg states; Zeeman and Stark effects
Elenco autori:
S. Cialdi, I. Boscolo, F. Castelli, F. Villa, G. Ferrari, M.G. Giammarchi
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