Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 17: Atomic Systems in External Fields III

A 17.3: Vortrag

Mittwoch, 4. März 2009, 14:45–15:00, VMP 6 HS-C

Heating dynamics in ion traps — Mathieu Marciante, Annette Calisti, Caroline Champenois, and •Martina Knoop — CNRS/Université de Provence, Centre de St Jerome, Case C21, 13397 Marseille Cedex 20, France

Molecular Dynamics simulations are carried out to evaluate the dynamics of ions in radiofrequency traps of different geometry, using the pseudo-potential approximation or the exact time oscillating description. Doppler laser cooling is taken into account by momentum kicks on absorption and emission of a photon by an ion. This detailed description allows to analyze the efficiency of the laser cooling depending on the direction of propagation of the laser and to quantify the role of Coulomb repulsion for the thermalization of the different degrees of freedom, depending on the number of trapped ions.