Linear Paul trap design for an optical clock with Coulomb crystals
Abstract
We report on the design of a segmented linear Paul trap for optical clock applications using trapped ion Coulomb crystals. For an optical clock with an improved short-term stability and a fractional frequency uncertainty of 10^-18, we propose 115In+ ions sympathetically cooled by 172Yb+. We discuss the systematic frequency shifts of such a frequency standard. In particular, we elaborate on high precision calculations of the electric radiofrequency field of the ion trap using the finite element method. These calculations are used to find a scalable design with minimized excess micromotion of the ions at a level at which the corresponding second- order Doppler shift contributes less than 10^-18 to the relative uncertainty of the frequency standard.
Cite
@article{arxiv.1109.6152,
title = {Linear Paul trap design for an optical clock with Coulomb crystals},
author = {Norbert Herschbach and Karsten Pyka and Jonas Keller and Tanja E. Mehlstäubler},
journal= {arXiv preprint arXiv:1109.6152},
year = {2015}
}