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P: Fachverband Plasmaphysik

P 19: Poster: Sonstiges

P 19.1: Poster

Mittwoch, 1. April 2009, 17:30–19:30, Foyer des IfP

Investigation of Space-Charge Phenomena in Gas-Filled Penning Trap — •Martin Breitenfeldt¹, Sven Sturm², Klaus Blaum³, Alexander Herlert⁴, and Lutz Schweikhard¹ — ¹Ernst-Moritz-Arndt-Universität, Greifswald, Germany — ²Johannes Gutenberg-Universität, Mainz, Germany — ³MPI für Kernphysik, Heidelberg, Germany — ⁴CERN, Geneva, Switzerland

The centering of ions in Penning traps by a quadrupolar radiofrequency excitation in the presence of a buffer gas has been studied in the regime of high charge densities. It is found to deviate significantly from the single-particle situation. In particular, the efficiency of the cooling process is affected as well as the resolving power. The behavior has been studied experimentally at the preparation Penning trap of the ISOLTRAP setup located at the on-line mass separator ISOLDE at CERN. In addition, the phenomenon has been investigated numerically by a custom-designed simulation.