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${\bar {\mathrm {H}}^{+}}$ production from collisions between positronium and keV antiprotons for GBAR
/ Comini, Pauline (IRFU, SPP, Saclay) ; Hervieux, Paul-Antoine (IPCMS, Strasbourg) ; Biraben, Francois (Paris, Lab. Kastler Brossel)
In the framework of the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment, cross sections for antihydrogen ion ( $\bar {\mathrm {H}}^{+}$ ) production in collisions between antiprotons ( $\bar {\mathrm {p}}$ ) and excited positronium atoms (Ps), with intermediate production of antihydrogen ( $\bar {\mathrm {H}}$ ), have been computed using a perturbative theory, namely Continuum Distorted Wave - Final State (CDW-FS). The results suggest to use antiprotons at 1, 2 or 6 keV with, respectively, Ps(3p,3d), Ps(2p) or no Ps excitation. [...]
2014 - 7 p.
- Published in : Hyperfine Interact. 228 (2014) 159-165
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.159-165
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$\bar{H}$ and $\bar{H}^{+}$ production cross sections for the GBAR experiment
/ Comini, P (IRFU, SPP, Saclay) ; Hervieux, P -A (IPCMS, Strasbourg)
The production and cooling of the + ion is the key point of the GBAR experiment (Gravitational Behaviour of Antihydrogen at Rest), which aims at performing the free fall of antihydrogen atoms to measure , the acceleration of antimatter on Earth. + ions will be obtained from collisions between a positronium cloud and antiprotons delivered by the AD/ELENA facility at CERN, with intermediate formation of antihydrogen atoms. [...]
2013 - 4 p.
- Published in : J. Phys. : Conf. Ser. 443 (2013) 012007
Fulltext: PDF;
In : 16th International Conference on Positron Annihilation, Bristol, UK, 19 - 24 Aug 2012, pp.012007
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Linac-based positron source and generation of a high density positronium cloud for the GBAR experiment
/ Liszkay, L (IRFU, Saclay) ; Comini, P (IRFU, Saclay) ; Corbel, C (Ecole Polytechnique) ; Debu, P (IRFU, Saclay) ; Dupré, P (CSNSM, Orsay) ; Grandemange, P (CSNSM, Orsay) ; Pérez, P (IRFU, Saclay) ; Rey, J -M (IRFU, Saclay) ; Ruiz, N (IRFU, Saclay) ; Sacquin, Y (IRFU, Saclay)
The aim of the recently approved GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment is to measure the acceleration of neutral antihydrogen atoms in the gravitational field of the Earth. The experimental scheme requires a high density positronium cloud as a target for antiprotons, provided by the Antiproton Decelerator (AD) – Extra Low Energy Antiproton Ring (ELENA) facility at CERN. [...]
2013 - 5 p.
- Published in : J. Phys. : Conf. Ser. 443 (2013) 012006
Fulltext: PDF;
In : 16th International Conference on Positron Annihilation, Bristol, UK, 19 - 24 Aug 2012, pp.012006
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Proposal for enhancement of antihydrogen ion production in the GBAR experiment
/ Cooke, D A (Zurich, ETH) ; Husson, A (CSNSM, Orsay) ; Lunney, D (CSNSM, Orsay) ; Crivelli, P (Zurich, ETH)
The production of antihydrogen ions (H̅+) in the GBAR experiment will occur via a two step charge exchange process. In a first reaction, the antiprotons(P̅) from the ELENA ring will capture a positron from a positronium(Ps) target producing antihydrogen (H̅) atoms. [...]
2018 - 6 p.
- Published in : EPJ Web Conf. 181 (2018) 01002
Fulltext: PDF;
In : International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 11 - 15 Sep 2017, pp.01002
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