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1.
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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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2.
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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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3.
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Towards a test of the weak equivalence principle of gravity using anti-hydrogen at CERN
/ Banerjee, D (ETH, Zurich (main)) ; Biraben, F (Paris, Lab. Kastler Brossel) ; Charlton, M (Swansea U.) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (CSNSM, Orsay) ; Crivelli, P (ETH, Zurich (main)) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, SPP, Saclay) ; Dodd, L (Swansea U.) ; Douillet, A (Paris, Lab. Kastler Brossel) et al.
The aim of the GBAR (Gravitational Behavior of Antimatter at Rest) experiment is to measure the free fall acceleration of an antihydrogen atom, in the terrestrial gravitational field at CERN and therefore test the Weak Equivalence Principle with antimatter. The aim is to measure the local gravity with a 1% uncertainty which can be reduced to few parts of 10-3..
2016 - 2 p.
- Published in : 10.1109/CPEM.2016.7540781
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4.
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The GBAR antimatter gravity experiment
/ Pérez, P (IRFU, SPhN, Saclay) ; Banerjee, D (Zurich, ETH) ; Biraben, F (Paris, Lab. Kastler Brossel) ; Brook-Roberge, D (IRFU, SPhN, Saclay) ; Charlton, M (Swansea U.) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, SPhN, Saclay) ; Crivelli, P (Zurich, ETH) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, SPhN, Saclay) et al.
The GBAR project (Gravitational Behaviour of Anti hydrogen at Rest) at CERN, aims to measure the free fall acceleration of ultracold neutral anti hydrogen atoms in the terrestrial gravitational field. The experiment consists preparing anti hydrogen ions (one antiproton and two positrons) and sympathetically cooling them with Be$^{+}$ ions to less than 10 μK. [...]
2015 - 7 p.
- Published in : Hyperfine Interact. 233 (2015) 21-27
In : 5th International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 15 - 19 Sep 2014, pp.21-27
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5.
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AD-7/GBAR status report for the 2015 CERN SPSC
/ GBAR Collaboration
The GBAR experiment will use one of the low energy antiproton beam lines from the ELENA ring that is being prepared and scheduled to start operating in 2017 [...]
CERN-SPSC-2015-001 ; SPSC-SR-151.
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2015.
Fulltext
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6.
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Prospects for studies of the free fall and gravitational quantum states of antimatter
/ Dufour, G. (College de France ; Paris, Lab. Kastler Brossel) ; Cassidy, D.B. (University Coll. London) ; Crivelli, P. (Zurich, ETH) ; Debu, P. (IRFU, SPP, Saclay) ; Lambrecht, A. (College de France ; Paris, Lab. Kastler Brossel) ; Nesvizhevsky, V.V. (Laue-Langevin Inst.) ; Reynaud, S. (College de France ; Paris, Lab. Kastler Brossel) ; Voronin, A.Yu. (Lebedev Inst.) ; Wall, T.E. (University Coll. London)
Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium and antihydrogen. Among those, the project GBAR in CERN aims to measure precisely the gravitational fall of ultracold antihydrogen atoms. [...]
arXiv:1409.0705.-
2015 - 16 p.
- Published in : Adv. High Energy Phys. 2015 (2015) 379642
Article from SCOAP3: PDF; Fulltext: PDF; External link: Preprint
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7.
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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.
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2014.
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8.
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Quantum Reflection of Antihydrogen in the GBAR Experiment
/ Dufour, Gabriel (Paris, Lab. Kastler Brossel) ; Guerout, Romain (Paris, Lab. Kastler Brossel) ; Lambrecht, Astrid (Paris, Lab. Kastler Brossel) ; Nesvizhevsky, Valery (Laue-Langevin Inst.) ; Reynaud, Serge (Paris, Lab. Kastler Brossel) ; Voronin, Alexei (Lebedev Inst.)
In the GBAR experiment, cold antihydrogen atoms will be left to fall on an annihilation plate with the aim of measuring the gravitational acceleration of antimatter. Here, we study the quantum reflection of these antiatoms due to the Casimir-Polder potential above the plate. [...]
arXiv:1312.6018.-
2014 - 8 p.
- Published in : Int. J. Mod. Phys.: Conf. Ser. 30 (2014) 1460265
Fulltext: S2010194514602658 - HTM; arXiv:1312.6018 - PDF; External link: Preprint
In : 2nd International Workshop on Antimatter and Gravity, Bern, Switzerland, 13 - 15 Nov 2013, pp.1460265
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9.
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Shaping the distribution of vertical velocities of antihydrogen in GBAR
/ Dufour, G. (Paris, Lab. Kastler Brossel) ; Debu, P. (IRFU, Saclay) ; Lambrecht, A. (Paris, Lab. Kastler Brossel) ; Nesvizhevsky, V.V. (Laue-Langevin Inst.) ; Reynaud, S. (Paris, Lab. Kastler Brossel) ; Voronin, A.Yu. (Lebedev Inst.)
GBAR is a project aiming at measuring the free fall acceleration of gravity for antimatter, namely antihydrogen atoms ($\overline{\mathrm{H}}$). Precision of this timing experiment depends crucially on the dispersion of initial vertical velocities of the atoms as well as on the reliable control of their distribution. [...]
arXiv:1312.5534.-
2014-01-30 - 21 p.
- Published in : Eur. Phys. J. C 74 (2014) 2731
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; External link: Preprint
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10.
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Quantum reflection of antihydrogen from nanoporous media
/ Dufour, G. (Paris, Lab. Kastler Brossel) ; Guérout, 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 nanoporous media due to the Casimir-Polder (CP) potential. Using a simple effective medium model, we show a dramatic increase of the probability of quantum reflection of antihydrogen atoms if the porosity of the medium increases. [...]
arXiv:1212.5678.-
2013-02-19 - 5 p.
- Published in : Phys. Rev. A 87 (2013) 022506
Fulltext: PDF; External link: Preprint
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