AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is an experiment that aims to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the Earth’s field. A cold antihydrogen beam will be produced by charge exchange reaction between cold antiprotons and positronium excited in Rydberg states. Rydberg positronium (with quantum number n between 20 and 30) will be produced by a two steps laser excitation. The antihydrogen beam, after being accelerated by Stark effect, will fly through the gratings of a moiré deflectometer. The deflection of the horizontal beam due to its free fall will be measured by a position sensitive detector. It is estimated that the detection of about 103 antihydrogen atoms is required to determine the gravitational acceleration with a precision of 1%. In this report an overview of the AEgIS experiment is presented and its current status is described. Details on the production of slow positronium and its excitation with lasers are discussed.
AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements / Sebastiano Mariazzi;Stefano Aghion;Claude Amsler;Akitaka Ariga;Tomoko Ariga;Alexandre S. Belov;Germano Bonomi;Philippe Braeunig;Roberto S. Brusa;Johan Bremer;Louis Cabaret;Carlo Canali;Ruggero Caravita;Fabrizio Castelli;Giovanni Cerchiari;Simone Cialdi;Daniel Comparat;Giovanni Consolati;Luca Dassa;Jan Hendrik Derking;Sergio Di Domizio;Lea Di Noto;Michael Doser;Alexey Dudarev;Antonio Ereditato;Rafael Ferragut;Andrea Fontana;Pablo Genova;Marco Giammarchi;Angela Gligorova;Sergei N. Gninenko;Stephen D. Hogan;Stefan Haider;Elena Jordan;Lars V. J?rgensen;Thomas Kaltenbacher;Jiro Kawada;Alban Kellerbauer;Mitsuhiro Kimura;Andreas Knecht;Daniel Krasnick?;Vittorio Lagomarsino;Sebastian Lehner;Chloe Malbrunot;Viktor A. Matveev;Frederic Merkt;Fabio Moia;Giancarlo Nebbia;Patrick N?d?lec;Markus K. Oberthaler;Nicola Pacifico;Vojtech Petr??ek;Ciro Pistillo;Francesco Prelz;Marco Prevedelli;Christian Regenfus;Cristina Riccardi;Ole R?hne;Alberto Rotondi;Heidi Sandaker;Paola Scampoli;James Storey;Martin A. Subieta Vasquez;Michal ?pa?ek;Gemma Testera;Renzo Vaccarone;Fabio Villa;Eberhard Widmann;Sandra Zavatarelli;Johann Zmeskal. - In: THE EUROPEAN PHYSICAL JOURNAL. D, ATOMIC, MOLECULAR AND OPTICAL PHYSICS. - ISSN 1434-6060. - STAMPA. - 68:(2014), pp. 1-6. [10.1140/epjd/e2013-40690-3]
AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements
PREVEDELLI, MARCO;
2014
Abstract
AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is an experiment that aims to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the Earth’s field. A cold antihydrogen beam will be produced by charge exchange reaction between cold antiprotons and positronium excited in Rydberg states. Rydberg positronium (with quantum number n between 20 and 30) will be produced by a two steps laser excitation. The antihydrogen beam, after being accelerated by Stark effect, will fly through the gratings of a moiré deflectometer. The deflection of the horizontal beam due to its free fall will be measured by a position sensitive detector. It is estimated that the detection of about 103 antihydrogen atoms is required to determine the gravitational acceleration with a precision of 1%. In this report an overview of the AEgIS experiment is presented and its current status is described. Details on the production of slow positronium and its excitation with lasers are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
