Cryogenic Penning-Trap Apparatus for Precision Experiments with Sympathetically Cooled (anti)protons

Abstract

Current precision experiments with single (anti)protons to test CPT symmetry progress at a rapid pace, but are complicated by the need to cool particles to sub-thermal energies. We describe a cryogenic Penning-trap setup for ${}^9$Be${}^{+}$ ions designed to allow coupling of single (anti)protons to laser-cooled atomic ions for sympathetic cooling and quantum logic spectroscopy. We report on trapping and laser cooling of clouds and single ${}^9$Be${}^{+}$ ions. We discuss prospects for a microfabricated trap to allow coupling of single (anti)protons to laser-cooled ${}^9$Be${}^{+}$ ions for sympathetic laser cooling to sub-mK temperatures on ms time scales.

Presented at the Eighth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, May 12-16, 2019