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A: Fachverband Atomphysik

A 6: Precision spectroscopy of atoms and ions II

A 6.1: Vortrag

Montag, 14. März 2011, 16:30–16:45, BAR 205

Status of the HITRAP cooler Penning trap. — •Svetlana Fedotova1, Nikolaas Brantjes1, Frank Herfurth1, Nikita Kotovskiy1, Claude Krantz2, Giancarlo Maero3, Wolfgang Quint1, Mouwafak Shaaban1, Alexey Sokolov1, and Jochen Steinmann11GSI Helmholtzzentrum für Schwerionenforshung, Darmstadt — 2Heidelberg University — 3University of Milano

HITRAP is a facility at GSI, Darmstadt for decelerating, cooling and storing of heavy, highly-charged ions. Bunches of up to 105 ions at 6 keV/u, as heavy as U92+, will be injected into the Penning trap for cooling first with electrons and then resistively. Extracted from the trap at low-energy, either quasi-continuous or bunched, ions will be delivered to high-precision atomic physics experiments. The trap is installed into the cold bore of a cryogen-free, 6 T superconducting magnet. Extensive cool down tests provided that the trap electrodes temperature reaches about 10 K which is the temperature the ions are cooled to using resistive cooling. Bunches of 1010 electrons can be injected into the trap from an electron source installed downstream. The electrostatic potentials of the trap electrodes will be arranged to form a nested trap in order to allow capture both, ions and electrons, simultaneously inside the trap. The sequence of the different processes: electron injection, ion capture in flight, electron and resistive cooling, controlled ejection - requires a sophisticated control system and extensive simulations. The most recent simulations investigate, for instance, the conditions under which the energy spread can be kept low during continuous ejection.

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