Year: 2025
Type: article
Abstract: We measure the time-dependent temperature and density distribution of antiprotons and positrons while slowly combining them to make antihydrogen atoms in a nested Penning-Malmberg trap. The total antihydrogen yield and the number of atoms escaping the trap as a beam are greatest when the positron temperature is lowest and when antiprotons enter the positron plasma at the smallest radius. We control these parameters by changing the rate at which we lower the electrostatic barrier between the antiproton and positron plasmas and by heating the positrons. With the optimal settings, we produce $2.3\times 10^6$ antihydrogen atoms per $15$-minute run, surpassing the previous state of the art -- $3.1\times 10^4$ atoms in $4$ minutes -- by a factor of $20$.
Authors: Hunter, E D, Bumbar, M, Amsler, C, Bayo, M, Breuker, H, Cerwenka, M, Costantini, G, Ferragut, R, Giammarchi, M, Gligorova, A, Gosta, G, Hori, M, Killian, C, Kraxberger, V, Kuroda, N, Lanz, A, Leali, M, Maero, G, Malbrunot, C, Mascagna, V, Matsuda, Y, Migliorati, S, Murtagh, D J, Romé, M, Sheldon, R E, Simon, M C, Tajima, M, Toso, V, Ulmer, S, Venturelli, L, Weiser, A, Widmann, E
Institutions: Imperial College London, University of Vienna, Austrian Academy of Sciences, Stefan Meyer Institute for Subatomic Physics, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Politecnico di Milano, RIKEN, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, University of Brescia, MBI - Marietta-Blau-Institut für Teilchenphysik, Max Planck Institute of Quantum Optics, The University of Tokyo, University of Milan, TRIUMF, Japan Synchrotron Radiation Research Institute
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7105360288
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