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Q: Fachverband Quantenoptik und Photonik

Q 33: Poster Präzisionsmessungen

Q 33.10: Poster

Tuesday, March 20, 2007, 16:30–18:30, Poster C

Towards High Precision Spectroscopy of 1s-2s in He+ — •Sebastian Knünz, Maximilian Herrmann, Valentin Batteiger, Thomas Udem, and Theodor W. Hänsch — Max-Planck-Institut für Quantenoptik, Hans-Kopfermannstr. 1, 85748 Garching

Recent progress in the development of XUV frequency combs opens the opportunity to perform high precision spectroscopy on the 1s-2s two photon transition in hydrogen-like helium at 60nm, an interesting candidate for high precision tests of bound state QED. Our approach of storing and cooling helium by co-stored magnesium ions in a linear ion trap will be presented together with an approach to detect the transition and our recent experimental progress.