Issue |
EPJ Web of Conf.
Volume 290, 2023
European Nuclear Physics Conference (EuNPC 2022)
|
|
---|---|---|
Article Number | 07001 | |
Number of page(s) | 6 | |
Section | P7 Fundamental Symmetries and Interactions | |
DOI | https://doi.org/10.1051/epjconf/202329007001 | |
Published online | 08 December 2023 |
https://doi.org/10.1051/epjconf/202329007001
Pulsed Production of Antihydrogen in AEgIS
1 Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy
2 INFN Pavia, via Bassi 6, 27100 Pavia, Italy
3 University of Latvia, Department of Physics Raina boulevard 19, LV-1586, Riga, Latvia
4 Institute of Experimental and Applied Physics, Czech Technical University in Prague, Husova 240/5, 11000 Prague 1, Czech Republic
5 Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy
6 TIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy
7 Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy
8 Department of Physics, University of Oslo, Sem Sælandsvei 24, 0371 Oslo, Norway
9 Department of Physics, University of Milano, via Celoria 16, 20133 Milano, Italy
10 Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Torun´, Grudziadzka 5, 87- 100 Torun, Poland
11 Politecnico of Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
12 INFN Milano, via Celoria 16, 20133, Milano, Italy
13 Physics Department, CERN, 1211 Geneva 23, Switzerland
14 University of Liverpool, UK and The Cockcroft Institute, Daresbury, UK
15 Warsaw University of Technology, Faculty of Physics ul. Koszykowa 75, 00-662, Warsaw, Poland
16 Department of Physics, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
17 Department of Physics, University of Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany
18 Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560080, India
19 Department of Physics, University of Pavia, via Bassi 6, 27100 Pavia, Italy
20 Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
21 INFN Genova, via Dodecaneso 33, 16146 Genova, Italy
Published online: 8 December 2023
Low-temperature antihydrogen atoms are an effective tool to probe the validity of the fundamental laws of Physics, for example the Weak Equivalence Principle (WEP) for antimatter, and -generally speaking- it is obvious that colder atoms will increase the level of precision.
After the first production of cold antihydrogen in 2002 [1], experimental efforts have substantially progressed, with really competitive results already reached by adapting to cold antiatoms some well-known techniques pre- viously developed for ordinary atoms. Unfortunately, the number of antihydrogen atoms that can be produced in dedicated experiments is many orders of magnitude smaller than of hydrogen atoms, so the development of novel techniques to enhance the production of antihydrogen with well defined (and possibly controlled) conditions is essential to improve the sensitivity.
We present here some experimental results achieved by the AEgIS Collaboration, based at the CERN AD (Antiproton Decelerator) on the production of antihydrogen in a pulsed mode where the production time of 90% of atoms is known with an uncertainty of ~ 250 ns [2]. The pulsed antihydrogen source is generated by the charge-exchange reaction between Rydberg positronium (Ps*) and an antiproton (p¯): p¯ + Ps* → H¯* + e−, where Ps* is produced via the implantation of a pulsed positron beam into a mesoporous silica target, and excited by two consecutive laser pulses, and antiprotons are trapped, cooled and manipulated in Penning-Malmberg traps. The pulsed production (which is a major milestone for AEgIS) makes it possible to select the antihydrogen axial temperature and opens the door for the tuning of the antihydrogen Rydberg states, their de-excitation by pulsed lasers and the manipulation through electric field gradients.
In this paper, we present the results achieved by AEgIS in 2018, just before the Long Shutdown 2 (LS2), as well as some of the ongoing improvements to the system, aimed at exploiting the lower energy antiproton beam from ELENA [3].
© The Authors, published by EDP Sciences, 2023
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