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1.
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Measured Properties of an Antihydrogen Beam
/ Hunter, E. D. ; Bumbar, M. ; Amsler, C. ; Bayo, M. N. ; Breuker, H. ; Cerwenka, M. ; Costantini, G. ; Ferragut, R. ; Giammarchi, M. ; Gligorova, A. et al.
/Asacusa AD-3
We report a factor of 100 increase in the antihydrogen beam intensity downstream of ASACUSA’s Cusp trap: 320 atoms detected per 15-minute run. The beam contains many Rydberg atoms, which we selectively ionize to determine their velocity and binding energy. [...]
CERN-EP-2025-195.-
Geneva : CERN, 2025 - 19.
Draft (restricted): PDF; Fulltext: PDF; External link: Additional Information
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2.
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Toward a pulsed antihydrogen beam for WEP tests in AEgIS
/ Huck, Saiva (CERN ; Hamburg U.) ; Auzins, Marcis (Latvia U.) ; Bergmann, Benedikt (IEAP CTU, Prague) ; Burian, Petr (IEAP CTU, Prague) ; Brusa, Roberto S (Trento U. ; TIFPA-INFN, Trento) ; Camper, Antoine (Oslo U.) ; Caravita, Ruggero (Trento U. ; TIFPA-INFN, Trento) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) ; Ciuryło, Roman (Torun, Copernicus Astron. Ctr.) ; Consolati, Giovanni (INFN, Milan ; Milan Polytechnic) et al.
The AEg̅IS collaboration at CERN’s AD produces antihydrogen atoms in the form of a pulsed, isotropic source with a precisely defined formation time. AEg̅IS has recently undergone major upgrades to fully benefit from the increased number of colder antiprotons provided by the new ELENA decelerator and to move toward forming a horizontal beam to directly investigate the influence of gravity on the H̅ atoms, thereby probing the Weak Equivalence Principle for antimatter. [...]
2023 - 4 p.
- Published in : EPJ Web Conf. 282 (2023) 01005
Fulltext: PDF;
In : International Symposium on Symmetries in Subatomic Physics, Vienna, Austria, 29 Aug - 2 Sep, pp.01005
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3.
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The scintillating bar detector of the ASACUSA experiment
/ Mascagna, V (U. Brescia ; INFN, Pavia) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Bayo, Matias (Milan Polytechnic ; INFN, Milan) ; Breuker, Horst (Wako, RIKEN) ; Bumbar, Marcus (Vienna U. ; CERN ; Imperial Coll., London) ; Cerwenka, Matti (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Costantini, Giovanni (U. Brescia ; INFN, Pavia) ; Ferragut, Rafael (Milan Polytechnic ; INFN, Milan) ; Giammarchi, Marco (INFN, Milan) ; Gligorova, Angela (Wako, RIKEN) et al.
Detecting charged pions emitted from antiproton annihilation on nuclei is a well-established technique utilized to determine annihilation vertex positions, crucial for several experiments in the antimatter field. For the past decade, a detector composed of plastic scintillating bars has been integral to the ASACUSA experiment, employed in both antihydrogen formation experiments and annihilation cross-section measurements. [...]
2025 - 8 p.
- Published in : PoS EXA-LEAP2024 (2025) 077
Fulltext: PDF;
In : International Conference on Exotic Atoms and Related Topics and Conference on Low Energy Antiprotons (EXA/LEAP 2024), Vienna, Austria, 26 - 30 Aug 2024, pp.077
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4.
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5.
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CPT and Lorentz symmetry tests with hydrogen using a novel in-beam hyperfine spectroscopy method applicable to antihydrogen experiments
/ Nowak, Lilian (CERN ; Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Malbrunot, Chloe (CERN) ; Simon, Martin C. (Stefan Meyer Inst. Subatomare Phys.) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Cuendis, Sergio Arguedas (Stefan Meyer Inst. Subatomare Phys.) ; Lahs, Sebastian (Stefan Meyer Inst. Subatomare Phys.) ; Lanz, Andreas (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Nanda, Amit (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Wiesinger, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Wolz, Tim (CERN) et al.
We present a Rabi-type measurement of two ground-state hydrogen hyperfine transitions performed in two opposite external magnetic field directions. This puts first constraints at the level of 2.3 10^-21 GeV on a set of coefficients of the Standard Model Extension, which were not measured by previous experiments. [...]
arXiv:2403.17763.-
2024-09-10 - 7 p.
- Published in : Phys. Lett. B 858 (2024) 139012
Fulltext: 2403.17763 - PDF; Publication - PDF;
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6.
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Injection and capture of antiprotons in a Penning–Malmberg trap using a drift tube accelerator and degrader foil
/ Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Bumbar, M. (CERN) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (INFN, Milan ; Padua U. ; INFN, Padua) ; Giammarchi, M. (Padua U. ; INFN, Padua) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) ; Higaki, H. (Hiroshima U.) et al.
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electron-cooled antiprotons at a fixed energy of 100 keV. [...]
arXiv:2403.09268.-
2024-06-12 - 22 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1065 (2024) 169529
Fulltext: PDF;
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7.
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8.
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CPT and Lorentz symmetry tests with hydrogen using a novel in-beam hyperfine spectroscopy method applicable to antihydrogen experiments
/ Nowak, Lilian ; Malbrunot, Chloé ; Simon, Martin C. ; Amsler, Claude ; Arguedas Cuendis, Sergio ; Lahs, Sebastian ; Lanz, Andreas ; Nanda, Amit ; Wiesinger, Markus ; Wolz, Tim et al.
/Asacusa AD-3
We present a Rabi-type measurement of two ground-state hydrogen hyperfine transitions performed in two opposite external magnetic field directions. This puts first constraints at the level of 2.3 × 10^{−21} GeV on a set of coefficients of the Standard Model Extension, which were not measured by previous experiments. [...]
CERN-EP-2024-089.-
Geneva : CERN, 2024 - 9.
Draft (restricted): PDF; Fulltext: PDF;
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9.
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RADES axion search results with a High-Temperature Superconducting cavity in an 11.7 T magnet
/ Ahyoune, S. (ICC, Barcelona U.) ; Álvarez Melcón, A. (Cartagena Politecnica U.) ; Cuendis, S. Arguedas (ICC, Barcelona U.) ; Calatroni, S. (CERN) ; Cogollos, C. (Garching, Max Planck Inst.) ; Díaz-Morcillo, A. (Cartagena Politecnica U.) ; Döbrich, B. (Garching, Max Planck Inst.) ; Gallego, J.D. (Yerkes Observ.) ; García-Barceló, J.M. (Garching, Max Planck Inst.) ; Gimeno, B. (Valencia U., IFIC) et al.
We describe the results of a haloscope axion search performed with an 11.7 T dipole magnet at CERN. The search used a custom-made radio-frequency cavity coated with high-temperature superconducting tape. [...]
arXiv:2403.07790; CERN-EP-2024-076; MPP-2024-55.-
Geneva : CERN, 2025-04-15 - 19 p.
- Published in : JHEP 2504 (2025) 113
Draft (restricted): PDF; Fulltext: CERN-EP-2024-076 - PDF; 2403.07790 - PDF; document - PDF;
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10.
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Injection and capture of antiprotons in a Penning-Malmberg trap using a drift tube accelerator and degrader foil
/ Amsler, C. ; Breuker, H. ; Bumbar, M. ; Chesnevskaya, S. ; Costantini, G. ; Ferragut, R. ; Giammarchi, M. ; Gligorova, A. ; Gosta, G. ; Higaki, H. et al.
/Asacusa AD-3
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electron- cooled antiprotons at a fixed energy of 100 keV. [...]
CERN-EP-2024-060.-
Geneva : CERN, 2024 - 22.
- Published in : Nucl. Instrum. Methods Phys. Res. A
Draft (restricted): PDF; Fulltext: PDF;
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