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MagGiver: Mapping of the GBAR Magnetic Field / Rosin, Etienne Alex
MagGiver is a tool to sense the magnetic field all around the GBAR experimental zone..
CERN-STUDENTS-Note-2024-008. - 2024
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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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Photodetachment of H- at the GBAR Experiment / Lampert, Lance
The GBAR experiment aims to measure the gravitational acceleration on antimatter, $\bar{g}.$ A crucial step to realizing this goal is the production of $\overline{\text{H}}^+$ atoms through the reaction $\overline{\text{H}} + \text{Ps} \rightarrow \overline{\text{H}}^+ + e^-,$ which does not have a precisely known cross-section. [...]
CERN-STUDENTS-Note-2023-040. - 2023
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GBAR: Gravitational behavior of antihydrogen at rest / Debu, Pascal (IRFU, Saclay) /GBAR Collaboration
The GBAR project aims to perform the first test of the Equivalence Principle with antimatter by measuring the free fall of ultra-cold antihydrogen atoms. The objective is to measure the gravitational acceleration to better than a percent in a first stage, with a long term perspective to reach a much higher precision using gravitational quantum states of antihydrogen. [...]
2012 - 9 p. - Published in : Hyperfine Interact. 212 (2012) 51-59
In : 10th international conference on the topic of Low Energy Antiproton Physics, TRIUMF, Vancouver, Canada, 27 Apr - 5 May 2011

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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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The Gbar project, or how does antimatter fall? / Indelicato, Paul (Paris, Lab. Kastler Brossel) ; Chardin, G (CSNSM, Orsay) ; Grandemange, P (CSNSM, Orsay) ; Lunney, D (CSNSM, Orsay) ; Manea, V (CSNSM, Orsay) ; Badertscher, A (Zurich, ETH) ; Crivelli, P (Zurich, ETH) ; Curioni, A (Zurich, ETH) ; Marchionni, A (Zurich, ETH) ; Rossi, B (Zurich, ETH) et al.
The Einstein classical Weak Equivalence Principle states that the trajectory of a particle is independent of its composition and internal structure when it is only submitted to gravitational forces. This fundamental principle has never been directly tested with antimatter. [...]
2014 - 10 p. - Published in : Hyperfine Interact. 228 (2014) 141-150
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.141-150

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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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Quantum reflection of antihydrogen from the Casimir potential above matter slabs / Dufour, G. (Paris, Lab. Kastler Brossel) ; Gerardin, A. (Paris, Lab. Kastler Brossel) ; Guerout, R. (Paris, Lab. Kastler Brossel) ; Lambrecht, A. (Paris, Lab. Kastler Brossel) ; Nesvizhevsky, V.V. (Laue-Langevin Inst.) ; Reynaud, S. (Paris, Lab. Kastler Brossel) ; Voronin, A.Yu. (Lebedev Inst.)
We study quantum reflection of antihydrogen atoms from matter slabs due to the van der Waals/Casimir-Polder (vdW/CP) potential. By taking into account the specificities of antihydrogen and the optical properties and width of the slabs we calculate realistic estimates for the potential and quantum reflection amplitudes. [...]
arXiv:1212.5676.- 2013-01-02 - 7 p. - Published in : Phys. Rev. A 87 (2013) 012901 Fulltext: PDF;

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Positron accumulation in the GBAR experiment / GBAR Collaboration
We present a description of the GBAR positron (e+) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discuss its performance. The overall goal of the GBAR experiment is to measure the acceleration of the neutral antihydrogen (H) atom in the terrestrial gravitational field by neutralising a positive antihydrogen ion (H+), which has been cooled to a low temperature, and observing the subsequent H annihilation following free fall. [...]
arXiv:2205.04530.- 2022-07-25 - 28 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1040 (2022) 167263 Fulltext: PDF;

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