The AEgIS experiment at CERN: Measuring antihydrogen free-fall in earth's gravitational field to test WEP with antimatter

R. S. Brusa, C. Amsler, T. Ariga, G. Bonomi, P. Bräunig, L. Cabaret, M. Caccia, R. Caravita, F. Castelli, G. Cerchiari, D. Comparat, G. Consolati, A. Demetrio, L. Di Noto, M. Doser, A. Ereditato, C. Evans, R. Ferragut, J. Fesel, A. FontanaS. Gerber, M. Giammarchi, A. Gligorova, F. Guatieri, S. Haider, H. Holmestad, T. Huse, A. Kellerbauer, D. Krasnický, V. Lagomarsino, P. Lansonneur, P. Lebrun, 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, B. Rienaecker, O. M. Rohne, A. Rotondi, M. Sacerdoti, H. Sandaker, R. Santoro, P. Scampoli, L. Smestad, F. Sorrentino, I. M. Strojek, G. Testera, I. C. Tietje, S. Vamosi, E. Widmann, P. Yzombard, J. Zmeskal, N. Zurlo

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment is designed with the objective to test the weak equivalence principle with antimatter by studying the free fall of antihydrogen in the Earth's gravitational field. A pulsed cold beam of antihydrogen will be produced by charge exchange between cold Ps excited in Rydberg state and cold antiprotons. Finally the free fall will be measured by a classical moiré deflectometer. The apparatus being assembled at the Antiproton Decelerator at CERN will be described, then the advancements of the experiment will be reported: positrons and antiprotons trapping measurements, Ps two-step excitation and a test-measurement of antiprotons deflection with a small scale moiré deflectometer.

Original languageEnglish
Article number012014
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Feb 22 2017
Externally publishedYes
Event14th International Workshop on Slow Positron Beam Techniques and Applications, SLOPOS 2016 - Matsue, Japan
Duration: May 22 2016May 27 2016

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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