Toward a pulsed antihydrogen beam for WEP tests in AEgIS

¹ Physics Department, CERN, 1211 Geneva 23, Switzerland
² Institute for Experimental Physics, Universität Hamburg, Hamburg, Germany
³ University of Latvia, Department of Physics Raina boulevard 19, LV-1586, Riga, Latvia
⁴ Czech Technical University, Prague, Brehová 7, 11519 Prague 1, Czech Republic
⁵ Institute of Experimental and Applied Physics, Czech Technical University in Prague, Czech Republic
⁶ INFN Pavia, via Bassi 6, 27100 Pavia, Italy
⁷ Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy
⁸ TIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy
⁹ Department of Physics, University of Oslo, Sem Sælandsvei 24, 0371 Oslo, Norway
¹⁰ INFN Milano, via Celoria 16, 20133 Milano, Italy
¹¹ Department of Physics “Aldo Pontremoli”, University of Milano, via Celoria 16, 20133 Milano, Italy
¹² Institute of Physics, Nicolaus Copernicus University in Torun´, Grudziadzka 5, 87-100 Torun´, Poland
¹³ Department of Aerospace Science and Technology, Politecnico di Milano, 20156 Milano, Italy
¹⁴ Warsaw University of Technology, Faculty of Physics, ul. Koszykowa 75, 00-662, Warsaw, Poland
¹⁵ Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, 1090 Vienna, Austria
¹⁶ Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560080, India
¹⁷ Department of Civil, Environ., Archt. Eng. and Mathematics, University of Brescia, Brescia, Italy
¹⁸ Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
¹⁹ University of Liverpool, UK and The Cockcroft Institute, Daresbury, United Kingdom
²⁰ Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway

^* e-mail: saiva.huck@cern.ch

Published online: 3 April 2023

Abstract

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. This contribution gives an overview of these upgrades as well as subsequent results from the first beam times with ELENA.