Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 13: Präzisionsmessungen I

Q 13.7: Talk

Monday, March 19, 2007, 18:15–18:30, 5L

Precision spectroscopy of singly ionized helium — •Valentin Batteiger, Maximilian Herrmann, Sebastian Knünz, Thomas Udem, and Theodor W. Hänsch — Max-Planck-Institut für Quantenoptik, Hans-Kopfermannstr. 1, 85748 Garching

The development of XUV frequency combs provides the opportunity for high resolution spectroscopy in the XUV regime. The 1s-2s two photon transition of hydrogen-like helium at 60 nm is an interesting candidate for precision tests of bound state QED. We discuss a spectroscopy scheme for singly ionized helium sympathetically cooled by co-stored magnesium ions in a segmented linear Paul trap. Our trap setup and the experimental progress is presented.