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AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements


Mariazzi, Sebastiano (Stefan Meyer Inst. Subatomare Phys.) ; Aghion, Stefano (INFN, Milan) ; Amsler, Claude (Bern U., LHEP) ; Ariga, Akitaka (Bern U., LHEP) ; Ariga, Tomoko (Bern U., LHEP) ; Belov, Alexandre S. (Moscow, INR) ; Bonomi, Germano (INFN, Pavia) ; Bräunig, Philippe (Kirchhoff Inst. Phys.) ; Brusa, Roberto S. (Trento U.) ; Bremer, Johan (CERN) ; Cabaret, Louis (Orsay) ; Canali, Carlo (Zurich U.) ; Caravita, Ruggero (Milan U.) ; Castelli, Fabrizio (Milan U.) ; Cerchiari, Giovanni (Milan U.) ; Cialdi, Simone (Milan U.) ; Comparat, Daniel (Orsay) ; Consolati, Giovanni (Milan Polytechnic) ; Dassa, Luca (INFM, Brescia) ; Derking, Jan Hendrik (CERN) ; Di Domizio, Sergio (INFN, Genoa) ; Di Noto, Lea (Trento U.) ; Doser, Michael (CERN) ; Dudarev, Alexey (CERN) ; Ereditato, Antonio (Bern U., LHEP) ; Ferragut, Rafael (INFN, Milan) ; Fontana, Andrea (INFN, Pavia) ; Genova, Pablo (INFN, Pavia) ; Giammarchi, Marco (INFN, Milan) ; Gligorova, Angela (Bergen U.) ; Gninenko, Sergei N. (Moscow, INR) ; Hogan, Stephen D. (University Coll. London) ; Haider, Stefan (CERN) ; Jordan, Elena (Heidelberg, Max Planck Inst.) ; Jørgensen, Lars V. (CERN) ; Kaltenbacher, Thomas (CERN) ; Kawada, Jiro (Bern U., LHEP) ; Kellerbauer, Alban (Heidelberg, Max Planck Inst.) ; Kimura, Mitsuhiro (Bern U., LHEP) ; Knecht, Andreas (CERN) ; Krasnický, Daniel (Genoa U.) ; Lagomarsino, Vittorio (Genoa U.) ; Lehner, Sebastian (Stefan Meyer Inst. Subatomare Phys.) ; Malbrunot, Chloe (CERN) ; Matveev, Viktor A. (Dubna, JINR) ; Merkt, Frederic (Zurich, ETH) ; Moia, Fabio (INFN, Milan) ; Nebbia, Giancarlo (INFN, Padua) ; Nédélec, Patrick (Lyon, IPN) ; Oberthaler, Markus K. (Kirchhoff Inst. Phys.) ; Pacifico, Nicola (Bergen U.) ; Petráček, Vojtech (Bern U., LHEP) ; Pistillo, Ciro (Bern U., LHEP) ; Prelz, Francesco (INFN, Milan) ; Prevedelli, Marco (Bologna U.) ; Regenfus, Christian (Zurich U.) ; Riccardi, Cristina (Pavia U.) ; Røhne, Ole (Oslo U.) ; Rotondi, Alberto (Pavia U.) ; Sandaker, Heidi (Bergen U.) ; Scampoli, Paola (Naples U.) ; Storey, James (Bern U., LHEP) ; Subieta Vasquez, Martin A. (INFN, Pavia) ; Spaček, Michal (INFN, Genoa) ; Czech Technical U. in Prague - FNSPE - B\oehova 7 - 11519 - Praha 1 - Czech Aff25 Testera, Gemma (INFN, Genoa) ; Vaccarone, Renzo (INFN, Genoa) ; Villa, Fabio (Milan U.) ; Widmann, Eberhard (Stefan Meyer Inst. Subatomare Phys.) ; Zavatarelli, Sandra (INFN, Genoa) ; Zmeskal, Johann (Bologna U.)

Published in: Eur.Phys.J.
Year: 2014
Vol.: D68
Page No: 41
Pages: 6
Year: 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 moir ́ e 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 10 3 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.

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DOI: 10.1140/epjd/e2013-40690-3
 Запись создана 2014-04-01, последняя модификация 2014-04-01



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