AEgIS (Antimatter experiment: gravity, interferometry, spectroscopy) is an experiment approved by CERN with the goal of studying antihydrogen physics. In AEgIS, antihydrogen will be produced by charge exchange reactions of cold antiprotons with positronium atoms excited in a Rydberg state (n > 20). In the first phase of the experiment, controlled acceleration by an electric field gradient (Stark effect) and subsequent measurement of free fall in a Moire deflectometer will allow a test of the weak equivalence principle. In a second phase, the antihydrogen will be slowed, confined, and laser-cooled to perform CPT studies and detailed spectroscopy. In the present work, after a general description of the experiment, the present status of advancement will be reviewed, with special attention to the production and excitation of positronium atoms.
Antihydrogen physics : gravitation and spectroscopy in AEgIS / R. Ferragut, A.S. Belov, G. Bonomi, I. Boscolo, R.S. Brusa, V.M. Byakov, L. Cabaret, A. Calloni, C. Canali, C. Carraro, F. Castelli, S. Cialdi, D. Comparat, G. Consolati, L. Dassa, N. Djourelov, M. Doser, G. Drobychev, A. Dudarev, A. Dupasquier, G. Ferrari, A. Fischer, P. Folegati, A. Fontana, L. Formaro, M.G. Giammarchi, S.N. Gninenko, R. Heyne, S.D. Hogan, L.V. Jorgensen, A. Kellerbauer, D. Krasnicky, V. Lagomarsino, G. Manuzio, S. Mariazzi, V.A. Matveev, C. Morhard, G. Nebbia, P. Nedelec, M.K. Oberthaler, D. Perini, V. Petracek, F. Prelz, M. Prevedelli, I.Y. Al Qaradawi, F. Quasso, C. Riccardi, O. Rohne, A. Rotondi, M. Sacerdoti, H. Sandaker, D. Sillou, S.V. Stepanov, H.H. Stroke, G. Testera, D. Trezzi, A.V. Turbabin, R. Vaccarone, F. Villa, U. Warring, S. Zavatarelli, A. Zenoni, D.S. Zvezhinskij. - In: CANADIAN JOURNAL OF PHYSICS. - ISSN 0008-4204. - 89:1(2011 Jan), pp. 17-24. [10.1139/P10-099]
Antihydrogen physics : gravitation and spectroscopy in AEgIS
I. Boscolo;F. Castelli;S. Cialdi;M. Sacerdoti;D. Trezzi;F. Villa;
2011
Abstract
AEgIS (Antimatter experiment: gravity, interferometry, spectroscopy) is an experiment approved by CERN with the goal of studying antihydrogen physics. In AEgIS, antihydrogen will be produced by charge exchange reactions of cold antiprotons with positronium atoms excited in a Rydberg state (n > 20). In the first phase of the experiment, controlled acceleration by an electric field gradient (Stark effect) and subsequent measurement of free fall in a Moire deflectometer will allow a test of the weak equivalence principle. In a second phase, the antihydrogen will be slowed, confined, and laser-cooled to perform CPT studies and detailed spectroscopy. In the present work, after a general description of the experiment, the present status of advancement will be reviewed, with special attention to the production and excitation of positronium atoms.
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