The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen - the simplest atom consisting entirely of antimatter - with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moiré deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moiré deflectometer coupled to a nuclear emulsion detector.London Centre for Terauniverse Studies (LCTS), using Funding from the European Research Council via the Advanced Investigator Grant 267352 (PI: John Ellis)
Testing the Weak Equivalence Principle with an antimatter beam at CERN / M. Kimura, S. Aghion, C. Amsler, A. Ariga, T. Ariga, A. Belov, G. Bonomi, P. Bräunig, J. Bremer, R.S. Brusa, L. Cabaret, M. Caccia, R. Caravita, F. Castelli, G. Cerchiari, K. Chlouba, S. Cialdi, D. Comparat, G. Consolati, A. Demetrio, H. Derking, L..D. Noto, M. Doser, A. Dudarev, A. Ereditato, R. Ferragut, A. Fontana, S. Gerber, M. Giammarchi, A. Gligorova, S. Gninenko, S. Haider, H. Holmestad, T. Huse, E.J. Jordan, J. Kawada, A. Kellerbauer, D. Krasnicky, V. Lagomarsino, S. Lehner, C. Malbrunot, S. Mariazzi, V. Matveev, Z. Mazzotta, G. Nebbia, P. Nedelec, M. Oberthaler, N. Pacifico, D. Pagano, L. Penasa, V. Petracek, C. Pistillo, F. Prelz, M. Prevedelli, L. Ravelli, C. Riccardi, O.M. Røhne, S. Rosenberger, A. Rotondi, M. Sacerdoti, H. Sandaker, R. Santoro, P. Scampoli, F. Sorrentino, M. Spacek, I.M. Strojek, J. Storey, M. Subieta, G. Testera, E. Widmann, P. Yzombard, S. Zavatarelli, J. Zmeskal. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 631:1(2015), pp. 012047.1-012047.9. ((Intervento presentato al 4. convegno Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE) tenutosi a London nel 2014.
Testing the Weak Equivalence Principle with an antimatter beam at CERN
F. Castelli;S. Cialdi;M. Giammarchi;Z. Mazzotta;F. Prelz;M. Sacerdoti;
2015
Abstract
The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen - the simplest atom consisting entirely of antimatter - with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moiré deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moiré deflectometer coupled to a nuclear emulsion detector.London Centre for Terauniverse Studies (LCTS), using Funding from the European Research Council via the Advanced Investigator Grant 267352 (PI: John Ellis)
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