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CERN Document Server 2,048 records found  1 - 10nextend  jump to record: Search took 0.27 seconds. 
1.
(100)
$\bar{H}^{+}$ ion production from collisions between antiprotons and excited positronium: cross sections calculations in the framework of the GBAR experiment / Comini, P (IRFU, SPP, Saclay ; CEA, DSM, Saclay) ; Hervieux, P -A (IPCMS, Strasbourg ; U. Strasbourg)
In the framework of the gravitational behaviour of antihydrogen at rest (GBAR) experiment, cross sections for the successive formation of and from collisions between positronium (Ps) and antiprotons ($\overline{p}$) have been computed in the range 0–30 keV $\overline{p}$ energy, using the continuum distorted wave-final state theoretical model in its three-body and four-body formulations. The effect of the electronic correlations in $\bar{H}^{+}$ on the total cross sections of $\bar{H}^{+}$ production has been studied using three different wave functions for H$^−$ (the matter equivalent of $\bar{H}^{+}$). [...]
2021 - 33 p.
- Published in : New J. Phys. Fulltext: PDF;
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2.
(91)
$\bar{H}$ 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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3.
(56)
${\bar {\mathrm {H}}^{+}}$ 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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4.
(45)

OPEN-PHO-EXP-2019-002
GBAR 		Views from the GBAR experiment
Vues de l'expérience GBAR
Pictures showing different parts of the GBAR exper [...]
27-05-2019
More >>
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5.
(35)
GBAR Gravitational Behavior of Antihydrogen at Rest / Durpé, P (Saclay)
The GBAR experiment aims to test the Equivalence Principle with antimatter by measuring the time of flight of ultra-cold antihydrogen atoms H in free fall. Antihydrogen atoms at ¯ ∼20 µK are provided by sympathetic cooling of antihydrogen ions $\bar{H}^+$ with laser cooled $Be^+$ ions. [...]
2011 - 6 p. - Published in : , pp. 391-396 Fulltext: PDF;
In : 46th Rencontres de Moriond and GPhyS Colloquium: Gravitational Waves and Experimental Gravity, La Thuile, Italy, 20 - 27 Mar 2011, pp.391-396
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6.
(29)
 GBAR / Joubert, Jinstitute et al. - GBAR.
Approved: 30 May 2012.-
Status: Preparation
External link: Experiment home page
Experiment: AD-7
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7.
(24)
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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8.
(23)
AD-7/GBAR status report for the 2014 CERN SPSC / GBAR Collaboration
A status report is given on the preparations and tests in view of the AD-7 / GBAR experiment at the future ELENA facility to be constructed at the CERN Antiproton Decelerator..
CERN-SPSC-2014-011 ; SPSC-SR-136. - 2014.
Fulltext
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9.
(22)
Synthesis of antihydrogen from in‐flight charge exchange of decelerated antiprotons in positronium for the GBAR experiment / Roumegou, Corentin
The GBAR experiment aims at measuring the gravitational acceleration of antimatter via the free fall of an antihydrogen atom [...]
CERN-THESIS-2023-274 ; tel-04391275 ; 2023UPASP093 - 196.

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10.
(18)
Development of a PbWO$_4$ Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment / Kim, B H (Seoul Natl. U.) ; Choi, J J (Seoul Natl. U.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crivelli, P (Zurich, ETH) ; Crépin, P-P (Paris, Lab. Kastler Brossel) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, Saclay) ; Dodd, L (Swansea U.) et al.
We have developed a PbWO$_{4}$ (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium ($\mathrm{o-Ps}$) cloud it creates. A simulation study shows that a setup based on such detectors may be used to determine the angular distribution of the emission and reflection of $\mathrm{o-Ps}$ to reduce part of the uncertainties of the measurement. [...]
2020 - 4 p. - Published in : Acta Phys. Pol. A 137 (2020) 122-125
In : 15th International Workshop on Slow Positron Beam Techniques and Applications, Prague, Czechia, 2-6 Sep 2019, pp.122-125
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