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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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3.
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Pulsed production of antihydrogen
/ Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, Massimiliano (Insubria U., Como ; INFN, Milan) ; Belov, Alexander (Moscow, INR) ; Bonomi, Germano (U. Brescia ; INFN, Pavia) ; Brusa, Roberto Sennen (Trento U. ; TIFPA-INFN, Trento) ; Caccia, Massimo (Insubria U., Como ; INFN, Milan) ; Camper, Antoine (CERN) ; Caravita, Ruggero (TIFPA-INFN, Trento ; CERN) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) ; Cheinet, Patrick (LAC, Orsay) et al.
Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and the design of highly sensitive experiments needs antihydrogen with controllable and well defined conditions. We present here experimental results on the production of antihydrogen in a pulsed mode in which the time when 90% of the atoms are produced is known with an uncertainty of ~250 ns. [...]
2021 - 11 p.
- Published in : Commun. Phys. 4 (2021) 19
Fulltext: PDF;
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4.
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Compression of a mixed antiproton and electron non-neutral plasma to high densities
/ Aghion, Stefano (Milan Polytechnic ; INFN, Milan) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Bonomi, Germano (Brescia U. ; INFN, Pavia) ; Brusa, Roberto S (Trento U. ; INFN, Trento) ; Caccia, Massimo (INFN, Milan ; Insubria U., Como) ; Caravita, Ruggero (Genoa U. ; INFN, Genoa) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) ; Cerchiari, Giovanni (Heidelberg, Max Planck Inst.) ; Comparat, Daniel (LAC, Orsay) ; Consolati, Giovanni (Milan Polytechnic ; INFN, Milan) et al.
We describe a multi-step “rotating wall” compression of a mixed cold antiproton–electron non-neutral plasma in a 4.46 T Penning–Malmberg trap developed in the context of the AEḡIS experiment at CERN. Such traps are routinely used for the preparation of cold antiprotons suitable for antihydrogen production. [...]
2018 - 11 p.
- Published in : Eur. Phys. J. D 72 (2018) 76
- Published in : Eur. Phys. J. D 73 (2019) 73
Erratum: PDF; Fulltext: PDF;
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5.
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Positron Manipulation and Positronium Laser Excitation in AEgIS
/ Mariazzi, Sebastiano (OAW, Vienna) ; Caravita, Ruggero ; Aghion, Stefano ; Amsler, Claude ; Ariga, Akitaka ; Ariga, Tomoko ; Bonomi, Germano ; Bräunig, Philippe ; Bremer, Johan (CERN) ; Brusa, Roberto S et al.
Production of antihydrogen by using the charge exchange reaction, as proposed by AEgIS (Antimatter Experiment: gravity, Interferometry, Spectroscopy), requires the formation of a dense cloud of positronium atoms excited to Rydberg states. In this work, the recent advances in AEgIS towards this result are described. [...]
2017 - 6 p.
- Published in : Defect and Diffusion Forum 373 (2017) 11-16
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6.
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AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements
/ Mariazzi, Sebastiano (Stefan Meyer Inst. Subatomare Phys.) ; Aghion, Stefano (INFN, Milan ; Milan Polytechnic) ; Amsler, Claude (Bern U., LHEP) ; Ariga, Akitaka (Bern U., LHEP) ; Ariga, Tomoko (Bern U., LHEP) ; Belov, Alexandre S (Moscow, INR) ; Bonomi, Germano (INFN, Pavia ; INFM, Brescia) ; Bräunig, Philippe (Kirchhoff Inst. Phys.) ; Brusa, Roberto S (Trento U. ; INFN, Trento) ; Bremer, Johan (CERN) et al.
AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is an experiment that aims to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the Earth’s field. A cold antihydrogen beam will be produced by charge exchange reaction between cold antiprotons and positronium excited in Rydberg states. [...]
2014 - 6 p.
- Published in : Eur. Phys. J. D 68 (2014) 41
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7.
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Further Evidence for Low Energy Protonium Production in Vacuum
/ Lodi Rizzini, Evandro (U. Brescia ; INFN, Brescia) ; Venturelli, Luca (U. Brescia ; INFN, Brescia) ; Zurlo, Nicola (U. Brescia ; INFN, Brescia) ; Charlton, Michael (Swansea U.) ; Amsler, Claude, (Zurich U.) ; Bonomi, Germano (Brescia U. ; INFN, Pavia) ; Canali, Carlo (Zurich U.) ; Carraro, Carlo (INFN, Genoa ; Genoa U.) ; Fontana, Andrea (INFN, Pavia) ; Genova, Pablo (INFN, Pavia ; Pavia U.) et al.
We describe an experiment performed in the ATHENA apparatus in which there is evidence that the antiproton-proton bound state, protonium, has been produced at very low energies in vacuum following the interaction of cold antiprotons with a trapped cloud of molecular hydrogen ions. [...]
CERN-PH-EP-2012-215.
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2012. - 25 p.
Full text - Draft (restricted)
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Fulltext
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Penning Trap Mass Spectrometry for Nuclear Structure Studies
/ Blaum, K ; George, Sebastian ; Beck, Dietrich ; Breitenfeldt, Martin ; Herfurth, Frank ; Herlert, Alexander (CERN) ; Kellerbauer, Alban ; Kluge, H Jurgen ; Lunney, David ; Savreux, Romain et al.
2006 - 8 p.
- Published in : Hyperfine Interact. 171 (2006) 83-91
In : 7th International Workshop on Application of Lasers in Atomic Nucleai Research, Poznan, Poland, 29 May - 1 Jun 2006, pp.83-91
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Recent results from the Penning trap mass spectrometer ISOLTRAP
/ Blaum, Klaus ; Audi, G ; Beck, D ; Bollen, Georg ; Delahaye, P ; Guenaut, C ; Herfurth, F ; Kellerbauer, Alban G ; Kluge, H J ; Lunney, M D et al.
In the last few years a number of new scientific highlights have been obtained by ISOLTRAP, the tandem Penning trap mass spectrometer for on-line mass measurements of short-lived radionuclides. The precise determination of nuclear binding energies far from stability includes nuclei that are produced at rates of 100 ions/s and with half-lives below 100 ms. [...]
2004
- Published in : Nucl. Phys. A 746 (2004) 305-310
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