Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 21: Poster: Precision spectroscopy of atoms and ions
A 21.19: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.V
Dynamic properties of 172Yb+ ion Coulomb crystals in Paul trap — •Kristijan Kuhlmann1, Karsten Pyka1, Jonas Keller1, David-Marcel Meier1, and Tanja E. Mehlstäubler1,2 — 1Quest-Institute, Physikalisch-Technische Bundesanstalt, Braunschweig — 2Department of Time & Frequency, Physikalisch-Technische Bundesanstalt, Braunschweig
Towards building an 172Yb+/115In+ optical clock yielding a frequency standard with a relative inaccuracy Δν/ν∼ 10−18, we study the dynamic properties of 172Yb+ ion Coulomb crystals in a linear Paul trap and the stability of linear ion chains close to the ‘zigzag’ phase transition. Furthermore, we present our new apparatus, the characterisation of our ion trap and results of micromotion measurements.
In order to obtain large secular frequencies, a helical resonator with a loaded Q=640 has been developed. In our experimental setup with a background pressure of 1· 10−10 mbar, single ion life times of up to 33h, linear chains of 50 ions and large 3D crystals have been realised. Also, using secular frequency measurements, decays in fluorescence of large laser cooled crystals were identified as YbOH+ molecule formations.