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Applied Physics B

, Volume 114, Issue 1–2, pp 231–241 | Cite as

A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock

  • Karsten Pyka
  • Norbert Herschbach
  • Jonas Keller
  • Tanja E. Mehlstäubler
Article

Abstract

We present a new setup to sympathetically cool 115In+ ions with 172Yb+ for optical clock spectroscopy. A first prototype ion trap made of glass-reinforced thermoset laminates was built, based on a design that minimizes axial micromotion and offers full control of the ion dynamics in all three dimensions. We detail the trap manufacturing process and the characterization of micromotion in this trap. A calibration of the photon-correlation spectroscopy technique demonstrates a resolution of 1.1 nm in motional amplitude of our measurements. With this method, we demonstrate a sensitivity to systematic clock shifts due to excess micromotion of \(|(\Updelta\nu/\nu)_{\rm mm}|=7.7\times10^{-20}\) along the direction of the spectroscopy laser beam. Owing to our on-board filter electronics on the ion trap chips, no rf phase shifts could be resolved at this level. We measured rf fields over a range of 400 μm along the ion trap axis and demonstrated a region of 70 μm where an optical frequency standard with a fractional inaccuracy of ≤1 × 10−18 due to micromotion can be operated.

Keywords

Compensation Voltage Optical Clock Secular Frequency Trap Axis Optical Frequency Standard 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We thank Christian Tamm, Max Harlander, and Yves Colombe for fruitful discussions on ion trap technology and Kihwan Kim for providing SMD parts for preliminary tests. Ekkehard Peik and Kristijan Kuhlmann are thanked for a careful reading of the manuscript. This work was supported by DFG through QUEST and the EU through SIB04—Ion Clock. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Karsten Pyka
    • 1
  • Norbert Herschbach
    • 1
  • Jonas Keller
    • 1
  • Tanja E. Mehlstäubler
    • 1
  1. 1.Physikalisch-Technische BundesanstaltBraunschweigGermany

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