Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 23: Poster II
A 23.23: Poster
Donnerstag, 11. März 2010, 16:30–19:00, Lichthof
Towards a Magnesium lattice clock — •Temmo Wübbena1, André Kulosa1, Jan Friebe1, Matthias Riedmann1, Andre Pape1, Hrishikesh Kelkar1, Sana Amairi1, Sina Malobabic1, Steffen Rühmann1, Ernst-Maria Rasel1, Wolfgang Ertmer1, Osama Terra2, Thorsten Feldmann2, Burghard Lipphardt2, Gesine Grosche2, and Harald Schnatz2 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Physikalisch-Technische Bundesanstalt
Neutral optical lattice clocks have exceeded the stability of microwave atomic clocks. The accuracy of todays best lattice clocks is limited by the shift of the clock transition due to the black body radiation of the atom’s environment [1]. To further improve the accuracy of lattice clocks, the applicability of alternative atomic species with lower sensitivity to the black body shift is studied. On this poster we will specify the relevant properties of neutral Magnesium and compare it to the established elements Ytterbium and Strontium as well as to Mercury. We present the current status of the Mg clock experiment including the latest measurements of the Mg clock transitions. We will also describe the necessary steps to realize a Mg lattice clock. Which include the determination of the magic wavelength which is predicted between 420 nm and 470 nm, the setup of an optical lattice and the development of an efficient loading scheme for loading Mg atoms into the lattice.
[1] A. D. Ludlow, et al.: "Sr Lattice Clock at 1×10−16 Fractional Uncertainty by Remote Optical Evaluation with a Ca Clock", Science, Vol. 319, p.1804-1808