AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

被引：10

作者：

Doser, M. ^{[1
]}

Aghion, S. ^{[2
,3
]}

Amsler, C. ^{[4
]}

Bonomi, G. ^{[5
,6
]}

Brusa, R. S. ^{[7
,8
]}

Caccia, M. ^{[3
,9
]}

Caravita, R. ^{[10
,11
]}

Castelli, F. ^{[3
,12
]}

Cerchiari, G. ^{[13
]}

Comparat, D. ^{[14
]}

Consolati, G. ^{[2
,3
]}

Demetrio, A. ^{[15
]}

Di Noto, L. ^{[10
,11
]}

Evans, C. ^{[2
,3
]}

Fani, M. ^{[10
,11
]}

Ferragut, R. ^{[2
,3
]}

Fesel, J. ^{[1
]}

Fontana, A. ^{[6
]}

Gerber, S. ^{[1
]}

Giammarchi, M. ^{[3
]}

Gligorova, A. ^{[4
]}

Guatieri, F. ^{[7
,8
]}

Haider, S. ^{[1
]}

Hinterberger, A. ^{[1
]}

Holmestad, H. ^{[16
]}

Kellerbauer, A. ^{[13
]}

Khalidova, O. ^{[1
]}

Krasnicky, D. ^{[11
]}

Lagomarsino, V. ^{[10
,11
]}

Lansonneur, P. ^{[17
]}

Lebrun, P. ^{[17
]}

Malbrunot, C. ^{[1
,4
]}

Mariazzi, S. ^{[18
]}

Marton, J. ^{[4
]}

Matveev, V. ^{[19
,20
]}

Mazzotta, Z. ^{[3
,12
]}

Mueller, S. R. ^{[15
]}

Nebbia, G. ^{[18
]}

Nedelec, P. ^{[17
]}

Oberthaler, M. ^{[15
]}

Pacifico, N. ^{[1
]}

Pagano, D. ^{[5
,6
]}

Penasa, L. ^{[7
,8
]}

Petracek, V. ^{[21
]}

Prelz, F. ^{[3
]}

Prevedelli, M. ^{[22
]}

Rienaecker, B. ^{[1
]}

Robert, J. ^{[14
]}

Rohne, O. M. ^{[16
]}

Rotondi, A. ^{[6
,23
]}

机构：

[1] CERN, Phys Dept, CH-1211 Geneva 23, Switzerland

[2] Politecn Milan, Piazza Leonardo Vinci 32, I-20133 Milan, Italy

[3] INFN Milano, Via Celoria 16, I-20133 Milan, Italy

[4] Austrian Acad Sci, Stefan Meyer Inst Subat Phys, Boltzmanngasse 3, A-1090 Vienna, Austria

[5] Univ Brescia, Dept Mech & Ind Engn, Via Branze 38, I-25123 Brescia, Italy

[6] INFN Pavia, Via Bassi 6, I-27100 Pavia, Italy

[7] Univ Trento, Dept Phys, Via Sommarive 14, Povo, Trento, Italy

[8] INFN Trento, TIFPA, Via Sommarive 14, I-38123 Povo, Trento, Italy

[9] Univ Insubria, Dept Sci, Via Valleggio 11, I-22100 Como, Italy

[10] Univ Genoa, Dept Phys, Via Dodecaneso 33, I-16146 Genoa, Italy

[11] INFN Genova, Via Dodecaneso 33, I-16146 Genoa, Italy

[12] Univ Milan, Dept Phys, Via Celoria 16, I-20133 Milan, Italy

[13] Max Planck Inst Nucl Phys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[14] Univ Paris Saclay, CNRS, Univ Paris Sud, Lab Aime Cotton,ENS Cachan, F-91405 Orsay, France

[15] Heidelberg Univ, Kirchhoff Inst Phys, Neuenheimer Feld 227, D-69120 Heidelberg, Germany

[16] Univ Oslo, Dept Phys, Sem Slandsvei 24, N-0371 Oslo, Norway

[17] Univ Lyon 1, CNRS, IN2P3, Inst Nucl Phys, F-69622 Villeurbanne, France

[18] INFN Padova, Via Marzolo 8, I-35131 Padua, Italy

[19] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[20] Joint Inst Nucl Res, Dubna 141980, Russia

[21] Czech Tech Univ, Brehova 7, Prague 11519 1, Czech Republic

[22] Univ Bologna, Viale Berti Pichat 6-2, I-40126 Bologna, Italy

[23] Univ Pavia, Dept Phys, Via Bassi 6, I-27100 Pavia, Italy

[24] Res Council Norway, POB 564, N-1327 Lysaker, Norway

[25] Heidelberg Univ, Dept Phys, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[26] Univ Brescia, Dept Civil Engn, Via Branze 43, I-25123 Brescia, Italy

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2018年 / 376卷 / 2116期

基金：

瑞士国家科学基金会; 欧洲研究理事会;

关键词：

antihydrogen; antiprotons; positrons; positronium; ANTIPROTONS; POSITRONIUM; COLLISIONS;

D O I：

10.1098/rsta.2017.0274

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The efficient production of cold antihydrogen atoms in particle traps at CERN's Antiproton Decelerator has opened up the possibility of performing direct measurements of the Earth's gravitational acceleration on purely antimatter bodies. The goal of the AEgIS collaboration is to measure the value of g for antimatter using a pulsed source of cold antihydrogen and a Moire deflectometer/Talbot-Lau interferometer. The same antihydrogen beam is also very well suited to measuring precisely the ground-state hyperfine splitting of the anti-atom. The antihydrogen formation mechanism chosen by AEgIS is resonant charge exchange between cold antiprotons and Rydberg positronium. A series of technical developments regarding positrons and positronium (Ps formation in a dedicated room-temperature target, spectroscopy of the n = 1-3 and n = 3-15 transitions in Ps, Ps formation in a target at 10K inside the 1 T magnetic field of the experiment) as well as antiprotons (high-efficiency trapping of (p) over bar, radial compression to sub-millimetre radii of mixed e(-)/(p) over bar plasmas in 1 T field, high-efficiency transfer of (p) over bar to the antihydrogen production trap using an in-flight launch and recapture procedure) were successfully implemented. Two further critical steps that are germane mainly to charge exchange formation of antihydrogen-cooling of antiprotons and formation of a beam of antihydrogen-are being addressed in parallel. The coming of ELENA will allow, in the very near future, the number of trappable antiprotons to be increased by more than a factor of 50. For the antihydrogen production scheme chosen by AEgIS, this will be reflected in a corresponding increase of produced antihydrogen atoms, leading to a significant reduction of measurement times and providing a path towards high-precision measurements. This article is part of the Theo Murphy meeting issue 'Antiproton physics in the ELENA era'.

引用

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