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, acceleration in a controlled way by an electric field gradient (Stark effect) and subsequent measurement of free fall in a Moiré 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

FERRAGUT, RAFAEL OMAR;CALLONI, ALBERTO;CONSOLATI, GIOVANNI;DUPASQUIER, ALFREDO;FOLEGATI, PAOLA;QUASSO, FIORENZA;M. Sacerdoti;
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, acceleration in a controlled way by an electric field gradient (Stark effect) and subsequent measurement of free fall in a Moiré 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.
CANADIAN JOURNAL OF PHYSICS
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/575915
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