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

2023/10/16 by Will, C., Wiesinger, M., Micke, P. +22
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Nuclear Experiment (nucl-ex) #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2310.10208

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 ⁹Be⁺. 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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