1.
|
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
|
|
2.
|
|
3.
|
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
|
|
4.
|
A pulsed high-voltage decelerator system to deliver low-energy antiprotons
/ Husson, A (IJCLab, Orsay) ; Kim, B H (Seoul Natl. U., Dept. Phys. Astron.) ; Welker, A (CERN) ; Charlton, M (Swansea U.) ; Choi, J J (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crépin, P -P (Paris, Lab. Kastler Brossel) ; Crivelli, P (Zurich, ETH-CSCS/SCSC) et al.
The GBAR (Gravitational Behavior of Antihydrogen at Rest) experiment at CERN requires efficient deceleration of 100 keV antiprotons provided by the new ELENA synchrotron ring to synthesize antihydrogen. This is accomplished using electrostatic deceleration optics and a drift tube that is designed to switch from -99 kV to ground when the antiproton bunch is inside – essentially a charged particle “elevator” – producing a 1 keV pulse. [...]
2021 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165245
|
|
5.
|
Preparing single ultra-cold antihydrogen atoms for free-fall in GBAR
/ Hilico, Laurent (ENSIIE, Evry) ; Karr, Jean-Philippe (ENSIIE, Evry) ; Douillet, Albane (ENSIIE, Evry) ; Indelicato, Paul (Paris, Lab. Kastler Brossel) ; Wolf, Sebastian (Mainz U., Inst. Phys.) ; Kaler, Ferdinand Schmidt (Mainz U., Inst. Phys.)
We discuss an experimental approach allowing to prepare antihydrogen atoms for the GBAR experiment. We study the feasibility of all necessary experimental steps: The capture of incoming $\bar{\rm H}^+$ ions at keV energies in a deep linear RF trap, sympathetic cooling by laser cooled Be$^+$ ions, transfer to a miniaturized trap and Raman sideband cooling of an ion pair to the motional ground state, and further reducing the momentum of the wavepacket by adiabatic opening of the trap. [...]
arXiv:1402.1695.-
2014 - 11 p.
- Published in : Int. J. Mod. Phys. Conf. Ser. 30 (2014) 1460269
Fulltext: PDF; External link: Preprint
In : 2nd International Workshop on Antimatter and Gravity, Bern, Switzerland, 13 - 15 Nov 2013, pp.1460269
|
|
6.
|
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
|
|
7.
|
|
8.
|
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
|
|
9.
|
Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
/ Adrich, P. (NCBJ, Swierk) ; Blumer, P. (Zurich, ETH) ; Caratsch, G. (Zurich, ETH) ; Chung, M. (UNIST, Ulsan) ; Cladé, P. (Paris, Lab. Kastler Brossel) ; Comini, P. (IRFU, Saclay) ; Crivelli, P. (Zurich, ETH) ; Dalkarov, O. (Unlisted) ; Debu, P. (IRFU, Saclay) ; Douillet, A. (Paris, Lab. Kastler Brossel ; U. Evry) et al.
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The antiproton beam was delivered by the AD/ELENA facility. [...]
arXiv:2306.15801.-
2023-11-06 - 18 p.
- Published in : Eur. Phys. J. C
Fulltext: 2306.15801 - PDF; Publication - PDF; Erratum - PDF;
|
|
10.
|
Positron production using a 9 MeV electron linac for the GBAR experiment
/ Charlton, M. (Swansea U.) ; Choi, J.J. (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M. (UNIST, Ulsan) ; Cladé, P. (Paris, Lab. Kastler Brossel) ; Comini, P. (IRFU, Saclay) ; Crépin, P.P. (Paris, Lab. Kastler Brossel) ; Crivelli, P. (Zurich, ETH) ; Dalkarov, O. (Lebedev Inst.) ; Debu, P. (IRFU, Saclay) ; Dodd, L. (Swansea U.) et al.
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. [...]
arXiv:2006.05966.-
2021-01-01 - 33 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 985 (2021) 164657
Fulltext: PDF;
|
|