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A: Fachverband Atomphysik

A 4: Precision Spectroscopy I

A 4.4: Vortrag

Montag, 6. März 2017, 15:30–15:45, N 3

Towards Laser Cooling of Highly Charged Ions at the ALPHATRAP Experiment — •Sandro Kraemer1,2, Ioanna Arapoglou1,2, Alexander Egl1,2, Martin Höcker1, Tim Sailer1,2, Andreas Weigel1,2, Robert Wolf1,3, Klaus Blaum1, and Sven Sturm11Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Fakultät für Physik und Astronomie, Universität Heidelberg — 3ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, The University of Sydney, NSW Australia

ALPHATRAP, a Penning-trap experiment currently being set up at the Max-Planck-Institut für Kernphysik, aims for a test of bound-state QED in very high field strengths by measuring the g-factor of highly charged ions (HCI) up to hydrogen-like 208Pb81+. In existing systems the stored particles are cooled using resistive and electronic feedback cooling.

As a novel development, laser cooled beryllium ions will be used to sympathetically cool the HCIs stored in the same trap. A setup for laser cooling of Be+-ions adressing the 2S1/22P3/2 transition at 313 nm is currently being developed. The lower achievable ion temperatures are expected to further increase the precision of the measurement. Additionally, new measurement schemes, such as simultaneous g-factor measurements on Coulomb crystallized ion pairs, become possible.

The laser system and the coupling into the trap will be discussed, and a current status of the project will be given.

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