Self-Excitation and Feedback Cooling of an Isolated Proton
Atomic Physics
2023-11-14 v2
Abstract
The first one-proton self-excited oscillator (SEO) and one-proton feedback cooling are demonstrated. In a Penning trap with a large magnetic gradient, the SEO frequency is resolved to the high precision needed to detect a one-proton spin flip. This is after undamped magnetron motion is sideband-cooled to a 14 mK theoretical limit, and despite random frequency shifts (larger than those from a spin flip) that take place every time sideband cooling is applied in the gradient. The observations open a possible path towards a million-fold improved comparison of the antiproton and proton magnetic moments.
Cite
@article{arxiv.1002.0868,
title = {Self-Excitation and Feedback Cooling of an Isolated Proton},
author = {N. Guise and J. DiSciacca and G. Gabrielse},
journal= {arXiv preprint arXiv:1002.0868},
year = {2023}
}