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 +22

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 temp…