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Updated: Jan 29, 2026

Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
Measurement of Ultralow Heating Rates of a Single Antiproton in a Cryogenic Penning Trap
M J Borchert1,2, P E Blessing1,3, J A Devlin1
1RIKEN, Ulmer Fundamental Symmetries Laboratory, Wako, Saitama 351-0198, Japan.
Abstract:
We report on the first detailed study of motional heating in a cryogenic Penning trap using a single antiproton. Employing the continuous Stern-Gerlach effect we observe cyclotron quantum transition rates of 6(1) quanta/h and an electric-field noise spectral density below 7.5(3.4)×10^{-20} V^{2} m^{-2} Hz^{-1}, which corresponds to a scaled noise spectral density below 8.8(4.0)×10^{-12} V^{2} m^{-2}, results which are more than 2 orders of magnitude smaller than those reported by other ion-trap experiments.
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