Linear Paul trap design for an optical clock with Coulomb crystals (Springer Link)

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.

* Content Type Journal Article

* Pages 1-16

* DOI 10.1007/s00340-011-4790-y

* Authors

* N. Herschbach, Physikalisch-Technische Bundesanstalt, Bundesallee 100,
38116 Braunschweig, Germany

* K. Pyka, Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116
Braunschweig, Germany

* J. Keller, Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116
Braunschweig, Germany

* T. E. Mehlstäubler, Physikalisch-Technische Bundesanstalt, Bundesallee
100, 38116 Braunschweig, Germany

* Journal Applied Physics B: Lasers ...

Springer Link