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Laser Cooling Positronium with Broadband Laser Pulses
/ Caravita, R (TIFPA/INFN, Trento) ; Alfaro Campos, S ; Auzins, M ; Berghold, M ; Bergmann, B ; Burian, P ; Brusa, R S ; Camper, A ; Castelli, F ; Cerchiari, G et al.
The first successful demonstration of broadband laser cooling of positronium (Ps) atoms, obtained within the AEgIS experiment at CERN, is presented here. By employing a custom-designed pulsed alexandrite laser system at 243 nm featuring long-duration pulses of 70 ns and an energy able to saturate the 1$^{3}$S–2$^{3}$P transition over the broad spectrum range of 360 GHz, the temperature of a room-temperature Ps cloud was reduced from 380 K to 170 K in 70 ns. [...]
2025 - 6 p.
- Published in : J. Phys. : Conf. Ser. 3029 (2025) 012002
Fulltext: PDF;
In : International Workshop on Positron and Positronium Chemistry, Kanazawa, Japan, 27 Oct - 1 Nov, pp.012002
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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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Positron-Positronium Converters in Reflection and Transmission Geometry for Gravitational Experiments with Antihydrogen using Moiré Deflectometry
/ Ferguson, R C (Trento U. ; INFN, Trento) ; Alfaro Campos, S (Siegen U. ; Innsbruck U.) ; Auzins, M (Latvia U.) ; Berghold, M (Munich, Tech. U.) ; Bergmann, B (Prague, Tech. U.) ; Burian, P (Prague, Tech. U.) ; Brusa, R S (Trento U. ; INFN, Trento) ; Camper, A (Oslo U.) ; Caravita, R (Trento U. ; INFN, Trento) ; Castelli, F (INFN, Milan ; Milan U.) et al.
In the context of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) located at CERN, positron-positronium converters with a high positron-positronium conversion efficiency have been designed in both reflection and transmission geometries. The converters utilize nanochanneled silicon target technology with positron conversion efficiencies up to around 50% and around 16%, at room temperature and in the absence of magnetic fields, for reflection and transmission respectively. [...]
2025 - 5 p.
- Published in : J. Phys. : Conf. Ser. 3029 (2025) 012005
Fulltext: PDF;
In : International Workshop on Positron and Positronium Chemistry, Kanazawa, Japan, 27 Oct - 1 Nov, pp.012005
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Real-time antiproton annihilation vertexing with submicrometer resolution
/ AEḡIS Collaboration
The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moiré deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric accuracy. [...]
arXiv:2406.16044.-
2025-04-04 - 10 p.
- Published in : Sci. Adv. 11 (2025) ads1176
Fulltext: 2406.16044 - PDF; document - PDF;
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An alexandrite laser system for positronium laser cooling
/ Gusakova, N (CERN ; Norwegian U. Sci. Tech.) ; Camper, A (Oslo U.) ; Caravita, R (Trento U. ; INFN, Trento) ; Penasa, L (Trento U. ; INFN, Trento ; U. Trento (main)) ; Glöggler, L T (CERN) ; Wolz, T (CERN) ; Krumins, V (CERN ; Latvia U.) ; Gustafsson, F P (CERN) ; Huck, S (CERN ; Hamburg U.) ; Volponi, M (CERN ; Trento U. ; INFN, Trento ; U. Trento (main)) et al.
We report on a Q-switched alexandrite based ∼100ns long pulse duration ultra-violet laser system. The central wavelength of the fundamental pulse is set by a Volume Bragg Grating in reflection and can be tuned between 728nm and 742nm. [...]
2024 - 8 p.
- Published in : Opt. Laser Technol. 182 (2025) 112097
Fulltext: PDF;
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TALOS (Total Automation of LabVIEW Operations for Science): A framework for autonomous control systems for complex experiments
/ Volponi, M. (CERN ; Trento U. ; INFN, Trento) ; Zielinski, J. (Warsaw U. of Tech.) ; Rauschendorfer, T. (CERN ; Leipzig U.) ; Huck, S. (CERN ; Hamburg U.) ; Caravita, R. (Trento U. ; INFN, Trento) ; Auzins, M. (CERN ; Latvia U.) ; Bergmann, B. (Prague, Tech. U.) ; Burian, P. (Prague, Tech. U.) ; Brusa, R.S. (Trento U. ; INFN, Trento) ; Camper, A. (Oslo U.) et al.
Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. [...]
arXiv:2409.01058.-
2024-08-01 - 22 p.
- Published in : Rev. Sci. Instrum. 95 (2024) 085116
Fulltext: 2409.01058 - PDF; Publication - PDF;
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