Linear Paul trap design for an optical clock with Coulomb crystals

Details Linear Paul trap design for an optical clock with Coulomb crystals Linear Paul trap design for an optical clock with Coulomb crystals

2011-09-28

arxiv.org/abs/1109.6152v1

Physics

Atomic Physics

Scientific paper

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.

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