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A: Fachverband Atomphysik

A 35: Ultra-cold atoms, ions and BEC VII (with Q)

A 35.8: Talk

Thursday, March 21, 2013, 15:45–16:00, B 305

Local Detection of Quantum Gases in Real Time — •Peter Federsel, Markus Stecker, Simon Bell, Hannah Schefzyk, Andreas Günther, and József Fortágh — Physikalisches Institut, Universität Tübingen, Deutschland

In this talk, we describe a novel scheme for local single-atom detection in trapped clouds of ultracold atoms. The scheme is based on local field ionization of atoms and subsequent ion detection. The ionization takes place in the locally enhanced near-field at the tip of a charged nanowire. Field strengths of up to 10¹⁰ V/m can be achieved, sufficient for field ionization of nearby rubidium atoms. The detection scheme is fully compatible to state-of-the-art atomchip experiments and includes ion-optics for extracting and guiding the ions to the sensitive single ion detector. We will show first results on this new detection scheme, including measurements on the tips field enhancement, characterization of the ion optics and field-ionization of thermal atoms.