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Imaging a positronium cloud in a 1 Tesla
/ Camper, Antoine (CERN) ; Aghion, Stefano (Milan Polytechnic ; INFN, Milan) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, Massimiliano (INFN, Milan ; Insubria U., Como) ; Belov, Alexander (Moscow, INR) ; Bonomi, Germano (INFM, Brescia ; INFN, Pavia) ; Brusa, Roberto (Trento U. ; TIFPA-INFN, Trento) ; Caccia, Massimo (INFN, Milan ; Insubria U., Como) ; Caravita, Ruggero (CERN) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) et al.
We report on recent developments in positronium work in the frame of antihydrogen production through charge exchange in the AEgIS collaboration [1]. In particular, we present a new technique based on spatially imaging a cloud of positronium by collecting the positrons emitted by photoionization. [...]
2019 - 7 p.
- Published in : EPJ Web Conf. 198 (2019) 00004
Fulltext: PDF;
In : Quantum Technology International Conference 2018, Paris, France, 5 - 7 Sep 2018, pp.00004
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AEgIS Experiment: Status & Outlook
/ Lansonneur, P (Lyon, IPN) ; Aghion, S (Milan, Polytech. ; INFN, Milan) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, G (U. Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Caravita, R (Genoa U. ; INFN, Genoa) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Comparat, D (LAC, Orsay) et al.
The AEGIS experiment 1 (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is planned to perform the first measurement of the gravitational acceleration on antimatter by observing the free fall of antihydrogen atoms. By combining techniques based on recent developments in the production of positronium and its laser excitation to Rydberg states, such a study seems indeed to be feasible for neutral antimatter. [...]
2017 - 6 p.
- Published in : , pp. 87-92
Fulltext: PDF;
In : 52nd Rencontres de Moriond on Gravitation, La Thuile, Italy, 25 Mar - 1 Apr 2017, pp.87-92
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Gravity and antimatter: the AEgIS experiment at CERN
/ Pagano, D (INFM, Brescia ; INFN, Pavia) ; Aghion, S (Bergen U. ; INFN, Milan) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Caravita, R (CERN) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Comparat, D (LAC, Orsay) et al.
From the experimental point of view, very little is known about the gravitational interaction between matter and antimatter. In particular, the Weak Equivalence Principle, which is of paramount importance for the General Relativity, has not yet been directly probed with antimatter. [...]
2020 - 5 p.
- Published in : J. Phys.: Conf. Ser. 1342 (2020) 012016
Fulltext: PDF;
In : 15th International Conference on Topics in Astroparticle and Underground Physics, Sudbury, Ontario, Canada, 24 - 28 July 2017, pp.012016
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Experiments with low-energy antimatter
/ Consolati, G (Milan Polytechnic ; INFN, Milan) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Belov, A (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (INFN, Padua ; Trento U. ; INFN, Trento) et al.
Investigations on antimatter allow us to shed light on fundamental issues of contemporary physics. The only antiatom presently available, antihydrogen, is produced making use of the Antiproton Decelerator (AD) facility at CERN. [...]
2015 - 7 p.
- Published in : EPJ Web Conf. 96 (2015) 01007
EDP Sciences Open Access article: PDF;
In : Dark Matter, Hadron Physics and Fusion Physics, Messina, Italy, 24 - 26 Sep 2014, pp.01007
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Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline
/ Pacifico, N (Bergen U.) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Alozy, J (CERN) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Bonomi, G (Brescia U. ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) et al.
We present here the first results obtained employing the Timepix3 for the detection and tagging of annihilations of low energy antiprotons. The Timepix3 is a recently developed hybrid pixel detector with advanced Time-of-Arrival and Time-over-Threshold capabilities and has the potential of allowing precise kinetic energy measurements of low energy charged particles from their time of flight. [...]
2016 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 831 (2016) 12-17
In : 10th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Xi'an, China, 25 - 29 Sep 2015, pp.12-17
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Overview of recent work on laser excitation of positronium for the formation of antihydrogen
/ Yzombard, P (LAC, Orsay) ; Amsler, C (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Bonomi, G (Brescia U. ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Cabaret, L (LAC, Orsay) ; Caccia, M (INFN, Milan) ; Caravita, R (Genoa U. ; INFN, Genoa ; CERN) ; Castelli, F (INFN, Milan ; Milan U.) et al.
The AEgIS experiment carried out at CERN aims to form a cold antihydrogen beam to perform precision studies on gravity. A key ingredient is the creation of antihydrogen via a charge-exchange process between trapped antiprotons and Rydberg excited positronium atoms (Ps). [...]
2017 - 11 p.
- Published in : JPS Conf. Proc. 18 (2017) 011026
Fulltext: PDF;
In : 12th International Conference on Low Energy Antiproton Physics, Kanazawa, Japan, 6 - 11 Mar 2016, pp.011026
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Protocol for pulsed antihydrogen production in the AE$\overline{g}$IS apparatus
/ Tietje, I C (CERN ; Berlin, Tech. U.) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, M (Insubria U., Como ; INFN, Milan) ; Belov, A (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (Insubria U., Como ; INFN, Milan) ; Camper, A (CERN) ; Caravita, R (TIFPA-INFN, Trento) ; Castelli, F (INFN, Milan ; Milan U.) et al.
The AEḡIS collaboration’s main goal is to measure the acceleration of antihydrogen it ($\textit{H}$) due to gravity. The experimental scheme is to form a pulsed beam whose vertical deflection is then measured by means of a moiré deflectometer [1]. [...]
2020 - 12 p.
- Published in : J. Phys.: Conf. Ser. 1612 (2020) 012025
Fulltext: PDF;
In : 18th Symmetries in Science, Bregenz, Austria, 4 - 9 Aug 2019, pp.012025
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Towards the first measurement of matter-antimatter gravitational interaction
/ Evans, C (Milan Polytechnic ; INFN, Milan) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, G (U. Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Caravita, R (Genoa U. ; INFN, Genoa) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Comparat, D (LAC, Orsay) et al.
The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment with the central aim to measure directly the gravitational acceleration of antihydrogen. Antihydrogen atoms will be produced via charge exchange reactions which will consist of Rydberg-excited positronium atoms sent to cooled antiprotons within an electromagnetic trap. [...]
2018 - 10 p.
- Published in : EPJ Web Conf. 182 (2018) 02040
Fulltext: PDF;
In : 6th International Conference on New Frontiers in Physics, Kolymbari, Krete, Greece, 17 - 29 Aug 2017, pp.02040
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