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CERN Document Server 7 εγγραφές βρέθηκαν  Η έρευνα πήρε 1.27 δευτερόλεπτα. 
1.
Monte-Carlo simulation of positronium laser excitation and anti-hydrogen formation via charge exchange / AEgIS Collaboration
The AEgIS experiment aims at producing antihydrogen (and eventually measuring the effects of the Earth gravitational field on it) with a method based on the charge exchange reaction between antiproton and Rydberg positronium. To be precise, antiprotons are delivered by the CERN Antiproton Decelerator (AD) and are trapped in a multi-ring Penning trap, while positronium is produced by a nanoporous silica target and is excited to Rydberg states by means of a two steps laser excitation. [...]
2019 - 11 p. - Published in : Hyperfine Interact. 240 (2019) 18
In : 13th International Conference on Low Energy Antiproton Physics, Paris, France, 12 - 16 Mar 2018, pp.18
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2.
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.
Positronium laser cooling in a magnetic field / Zimmer, Christian (CERN ; U. Heidelberg, ITP ; Milan Polytechnic ; Oslo U.) ; Yzombard, Pauline (Paris, Lab. Kastler Brossel) ; Camper, Antoine (Oslo U.) ; Comparat, Daniel (LAC, Orsay)
We study realistic 3D laser cooling of positronium (Ps) in the presence of a magnetic field. Triplet and singlet states mixing due to the magnetic field, and dynamical Stark effect, generally produce higher annihilation rates than in the zero-field case. [...]
2021 - 21 p. - Published in : Phys. Rev. A 104 (2021) 023106 Fulltext: PDF;
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4.
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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5.
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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6.
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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7.
Laser Cooling of Molecular Anions / Yzombard, Pauline (Orsay) ; Hamamda, Mehdi (Orsay) ; Gerber, Sebastian (CERN) ; Doser, Michael (CERN) ; Comparat, Daniel (Orsay)
We propose a scheme for laser cooling of negatively charged molecules. We briefly summarise the requirements for such laser cooling and we identify a number of potential candidates. [...]
arXiv:1506.06505.- 2015 - 5 p. - Published in : Phys. Rev. Lett. 11 (2015) 213001 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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