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A: Fachverband Atomphysik

A 8: Precision Spectroscopy III

A 8.3: Vortrag

Dienstag, 20. März 2007, 14:45–15:00, 6G

The HITRAP Cooler Trap: simulation of cooling of highly-charged ions in a Penning trap with a Particle-In-Cell code — •Giancarlo Maero¹, Frank Herfurth¹, Oliver Kester¹, Jürgen Kluge¹, Stephen Koszudowski¹, Wolfgang Quint¹, Stefan Schwarz², and Günter Zwicknagel³ — ¹GSI Darmstadt, Germany — ²MSU, East Lansing, USA — ³Universität Erlangen, Germany

In the HITRAP facility heavy and highly-charged ions up to U⁹²⁺ will be stopped and cooled in order to perform experiments on atomic properties, like collision studies, precision measurements and hyperfine spectroscopy. The Cooler Trap is designed to catch 10e5 particles, cool them down to 4 K and manipulate them before extraction in both pulsed and quasi-continuous modes. Therefore simulation of the dynamics of the bunch from injection to extraction is necessary. The processes occurring during the 10 s stay of the ions in the Penning trap, all of which need a numerical investigation, are particle cloud formation in the presence of space charge, electron and resistive cooling. We give an overview of the setup and show the results obtained with a PIC (Particle-In-Cell) code built for this purpose.