Fredrik Olof Andre Parnefjord Gustafsson
(CERN)
The Antimatter Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) at CERN's Antimatter Decelerator (AD) is used for the production and study of antimatter bound systems, such as antihydrogen for the gravitational influence on a horizontal beam of cold antihydrogen atoms [1]. AEGIS has achieved remarkable performance in trapping antiprotons and successfully demonstrated the pulsed production of Rydberg excited antihydrogen [2,3]. The production process of antihydrogen is achieved through a charge-exchange reaction using laser-excited Rydberg positronium interacting with cold antiprotons stored within a Penning-Malmberg trap.
This technique is currently being adapted for the controlled formation of antiprotonic atoms containing medium-heavy nuclei [4]. So far, antiprotonic atoms were formed in beam-on-target experiments, primarily focusing on light systems such as antiprotonic helium [5,6]. Using the charge-exchange procedure developed for antihydrogen production, antiprotonic atoms can be selectively formed in highly excited Rydberg states inside a trapping environment, enabling precision spectroscopy of these systems. The relaxation of the bound antiproton leads to Auger electron and x-ray photon emission, eventually forming a fully or nearly fully stripped nucleus with the bound antiproton. The subsequent annihilation on the nucleus will result in the formation of highly charged nuclear fragments which can be captured within a nested trap. The rapid capture of the highly charged nuclear fragments opens the avenues for new applications and nuclear structure studies [7].
Recent, experiments at AEgIS have successfully demonstrated the trapping of fully stripped nuclear fragments resulting from antiprotons annihilating with residual nitrogen gas in the cryogenic trap. These highly charged fragments were manipulated and identified through a time-of-flight spectroscopy. Furthermore, the ongoing installation of a negative ion source will allow the first co-trapping of negative ions with cold antiprotons for the controlled laser-triggered formation of antiprotonic atoms. These new developments pave the way for precision studies using antiprotonic atoms and exotic highly charged nuclei at AEgIS.
[1] M. Doser et al. 2012 Class. Quantum Grav. 29 184009
[2] D. Krasnicky et al. 2016 Phys. Rev. A 94 022714
[3] C. Amsler et al. 2021 Commun. Phys. 4 19
[4] Doser, M. Progress in Particle and Nuclear Physics (2022): 103964.
[5] Hori, Masaki, et al. PRL 87.9 (2001): 093401.
[6] Sótér, Anna, et al. Nature 603.7901 (2022): 411-415.
[7] Kornakov, G., et al. Phys. Rev. C 107.3 (2023): 034314.
Fredrik Olof Andre Parnefjord Gustafsson
(CERN)
Adam Ryszard Linek
(Nicolaus Copernicus University (PL))
Anna Giszczak
(Warsaw University of Technology (PL))
Antoine Camper
(University of Oslo (NO))
B. Bergmann
(Institute of Experimental and Applied Physics, Czech Technical University in Prague, Husova 240/5, 110 00, Prague 1, Czech Republic)
Benjamin Rienacker
(University of Liverpool (GB))
Mr
Bharat Singh Rawat
(University of Liverpool / Cockcroft Institute)
Carsten Peter Welsch
(Cockcroft Institute / University of Liverpool)
Dariusz Tefelski
(Warsaw University of Technology (PL))
Dorota Nowicka
(Warsaw University of Technology (PL))
Fabrizio Castelli
(Università degli Studi e INFN Milano (IT))
Francesco Guatieri
(Universita degli Studi di Trento and INFN (IT))
Francesco Prelz
(Università degli Studi e INFN Milano (IT))
Georgy Kornakov
(Warsaw University of Technology (PL))
Giovanni Cerchiari
Giovanni Consolati
(Politecnico di Milano (IT))
Grzegorz Kasprowicz
(Warsaw University of Technology (PL))
Gunn Khatri
(CERN)
Heidi Sandaker
(University of Oslo (NO))
Jakub Zielinski
(Warsaw University of Technology (PL))
Kamil Eliaszuk
(Warsaw University of Technology (PL))
Lidia Kalina Lappo
(Warsaw University of Technology (PL))
Lisa Theresa Gloggler
(CERN)
Luca Penasa
(Universita degli Studi di Trento and INFN (IT))
Luca Povolo
(Universita degli Studi di Trento and INFN (IT))
Lukasz Graczykowski
(Warsaw University of Technology (PL))
Dr
Lukasz Klosowski
(Nicolaus Copernicus University (PL))
M. Auzins
(University of Latvia, Department of Physics Raina boulevard 19, LV-1586, Riga, Latvia)
Malgorzata Anna Janik
(Warsaw University of Technology (PL))
Malgorzata Grosbart
(CERN)
Mr
Marco Volponi
(Universita degli Studi di Trento and INFN (IT))
Mariusz Piwinski
(Nicolaus Copernicus University (PL))
Matthias Germann
Michael Doser
(CERN)
Michal Zawada
(Nicolaus Copernicus University)
Natali Gusakova
(Norwegian University of Science and and Technology (NTNU) (NO))
Nicola Zurlo
(Universita di Brescia (IT))
Ole Rohne
(University of Oslo (NO))
P. Burian
(Institute of Experimental and Applied Physics, Czech Technical University in Prague, Husova 240/5, 110 00, Prague 1, Czech Republic)
Pawel Moskal
(Jagiellonian University)
Dr
Petr Smolyanskiy
(Czech Technical University in Prague (CZ))
R. S Brusa
(Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy fTIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy)
Roman Jerzy Ciurylo
(Nicolaus Copernicus University (PL))
Ruggero Caravita
(Universita degli Studi di Trento and INFN (IT))
Sadiq Rangwala
Saiva Huck
(Hamburg University (DE))
Sebastiano Mariazzi
(Universita degli Studi di Trento and INFN (IT))
Stanislav Pospisil
(Czech Technical University in Prague (CZ))
Stefan Haider
(CERN)
Sushil Sharma
(Jagiellonian University (PL))
Tassilo Rauschendorfer
(Universitaet Leipzig (DE))
Tomasz Sowinski
(Polish Academy of Sciences (PL))
Tymoteusz Henryk Januszek
(Warsaw University of Technology (PL))
Valts Krumins
(University of Latvia (LV))
Vojtech Petracek
(Czech Technical University (CZ))
Volodymyr Rodin
(CERN)
