Self-excitation and feedback cooling of an isolated proton

N. Guise*, J. Disciacca, G. Gabrielse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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 (typically larger than those from a spin flip) that take place every time sideband cooling is applied. The observations open a possible path towards a million-fold improved comparison of the p̄ and p magnetic moments.

Original languageEnglish (US)
Article number143001
JournalPhysical review letters
Issue number14
StatePublished - Apr 7 2010

ASJC Scopus subject areas

  • General Physics and Astronomy


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