Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature

C. Will; M. Wiesinger; P. Micke; H. Yildiz; T. Driscoll; S. Kommu; F. Abbass; B. P. Arndt; B. B. Bauer; S. Erlewein; M. Fleck; J. I. Jäger; B. M. Latacz; A. Mooser; D. Schweitzer; G. Umbrazunas; E. Wursten; K. Blaum; J. A. Devlin; C. Ospelkaus; W. Quint; A. Soter; J. Walz; C. Smorra; S. Ulmer

arXiv · 2310.10208

Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature

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Abstract

We demonstrate a new temperature record for image-current mediated sympathetic cooling of a single proton in a cryogenic Penning trap by laser-cooled $^9$Be$^+$. An axial mode temperature of 170 mK is reached, which is a 15-fold improvement compared to the previous best value. Our cooling technique is applicable to any charged particle, so that the measurements presented here constitute a milestone towards the next generation of high-precision Penning-trap measurements with exotic particles.

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C. Will, M. Wiesinger, P. Micke, H. Yildiz, T. Driscoll, S. Kommu, F. Abbass, B. P. Arndt, B. B. Bauer, S. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, A. Mooser, D. Schweitzer, G. Umbrazunas, E. Wursten, K. Blaum, J. A. Devlin, C. Ospelkaus, W. Quint, A. Soter, J. Walz, C. Smorra, S. Ulmer. 2023-10-16. Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature. https://arxiv.org/abs/2310.10208

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