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

14th International Workshop on Slow Positron Beam Techniques & Applications

Brusa, R.S.^1,2 ; Amsler, C.^3 ; Ariga, T.^3 ; Bonomi, G.^4,5 ; Bräunig, P.^6 ; Cabaret, L.^7 ; Caccia, M.^8,9 ; Caravita, R.^10,11 ; Castelli, F.^8,12 ; Cerchiari, G.^13 ; Comparat, D.^7 ; Consolati, G.^8,14 ; Demetrio, A.^6 ; Di Noto, L.^10,11 ; Doser, M.^15 ; Ereditato, A.^3 ; Evans, C.^8,14 ; Ferragut, R.^8,14 ; Fesel, J.^15 ; Fontana, A.^5 ; Gerber, S.^15 ; Giammarchi, M.^8 ; Gligorova, A.^16 ; Guatieri, F.^1,2 ; Haider, S.^15 ; Holmestad, H.^17 ; Huse, T.^17 ; Kellerbauer, A.^13 ; Krasnický, D.^10,11 ; Lagomarsino, V.^10,11 ; Lansonneur, P.^18 ; Lebrun, P.^18 ; Malbrunot, C.^15,19 ; Mariazzi, S.^19 ; Matveev, V.^20,21 ; Mazzotta, Z.^8,12 ; Nebbia, G.^22 ; Nedelec, P.^18 ; Oberthaler, M.^6 ; Pacifico, N.^16 ; Pagano, D.^4,5 ; Penasa, L.^1,2 ; Petracek, V.^23 ; Pistillo, C.^3 ; Prelz, F.^8 ; Prevedelli, M.^24 ; Ravelli, L.^1,2 ; Rienaecker, B.^15 ; Rohne, O.M.^17 ; Rotondi, A.^5,25 ; Sacerdoti, M.^8,12 ; Sandaker, H.^17 ; Santoro, R.^8,9 ; Scampoli, P.^3,26 ; Smestad, L.^15,27 ; Sorrentino, F.^10,11 ; Strojek, I.M.^18 ; Testera, G.^11 ; Tietje, I.C.^15 ; Vamosi, S.^19 ; Widmann, E.^19 ; Yzombard, P.^7 ; Zmeskal, J.^19 ; Zurlo, N.^5,28

Department of Physics, University of Trento, via Sommarive 14, Povo, Trento

38123, Italy^1

TIFPA/INFN Trento, via Sommarive 14, Povo, Trento

38123, Italy^2

Laboratory for High Energy Physics, Albert Einstein Center for Fundamental Physics, University of Bern, Bern

3012, Switzerland^3

Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, Brescia

25123, Italy^4

INFN Pavia, via Bassi 6, Pavia

2790, Italy^5

Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, Heidelberg

68120, Germany^6

Laboratoire Aimé Cotton, Université Paris-Sud, ENS Cachan, CNRS, Université Paris-Saclay, Orsay Cedex

91405, France^7

INFN Milano, via Celoria 16, Milano

20133, Italy^8

Department of Science, University of Insubria, Via Valleggio 11, Como

2290, Italy

(10) Department of Physics, University of Genova, via Dodecaneso 33, Genova

16146, Italy

(11) INFN Genova, via Dodecaneso 33, Genova

16146, Italy

(12) Department of Physics, University of Milano, via Celoria 16, Milano

20133, Italy

(13) Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, Heidelberg

68117, Germany

(14) Politecnico of Milano, Piazza Leonardo da Vinci 32, Milano

20133, Italy

(15) Physics Department, CERN, Geneva 23

1211, Switzerland

(16) Institute of Physics and Technology, University of Bergen, Allégaten 55, Bergen

5007, Norway

(17) Department of Physics, University of Oslo, Sem aælandsvei 24, OSLO

0371, Norway

(18) Institute of Nuclear Physics, CNRS/IN2p3, University of Lyon 1, Villeurbanne

68622, France

(19) Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, VIENNA

980, Austria

(20) Institute for Nuclear Research, Russian Academy of Science, Moscow

117312, Russia

(21) Joint Institute for Nuclear Research, Dubna

141980, Russia

(22) INFN Padova, via Marzolo 8, Padova

35131, Italy

(23) Czech Technical University, Brehová 7, Prague

11518, Czech Republic

(24) University of Bologna, Viale Berti Pichat 6/2, Bologna

40126, Italy

(25) Department of Physics, University of Pavia, via Bassi 6, Pavia

2790, Italy

(26) Department of Physics ettore Pancini, University of Napoli Federico II, Complesso Universitario di Monte S. Angelo, Napoli

80126, Italy

(27) Research Council of Norway, P.O. Box 564, Lysaker

NO-1327, Norway

(28) Department of Civil Engineering, University of Brescia, via Branze 43, Brescia

25123, Italy^9

关键词: Antihydrogen;    Antiproton decelerator;    Charge exchanges;    Deflectometers;    Earth's gravitational field;    Test measurements;    Two-step excitation;    Weak equivalence principle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/791/1/012014/pdf
DOI  :  10.1088/1742-6596/791/1/012014

来源: IOP

【 摘 要 】

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.