Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.49: Poster

Donnerstag, 17. März 2011, 16:30–19:30, P1

Ring structures in linear multipole ion traps — •Florian Cartarius, Cecilia Cormick, and Giovanna Morigi — Theoretische Physik, Universität des Saarlandes, 66041 Saarbrücken, Germany

Doppler cooled ions in linear radiofrequency multipole traps [1] can organize in ordered structures. The equilibrium positions of the ions result from the balance between the mutual Coulomb repulsion and the external trapping potential. If the confinement along the axial direction of the trap is much tighter than along the transverse directions, the ions can form ring-shaped structures. In this work, we theoretically analyse the equilibrium configurations of dozens of ions in anisotropic traps for different orders of the multipolar potential. In particular, we identify parameter regimes where the one-ring arrangement is stable, and study the collective motional modes.

D. Douglas, A. Frank, and D. Mao, Mass Spectrom. Rev. 24, 1-29 (2005)