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A: Fachverband Atomphysik
A 12: Precision Spectroscopy of Atoms and Ions II
A 12.5: Talk
Tuesday, March 3, 2009, 15:15–15:30, VMP 6 HS-C
Ion capture and non-destructive detection in the SPECTRAP experiment — •Zoran Andjelkovic1,5, Shailen Bharadia4, Bettina Sommer2,5, Stefan Stahl3, Richard Thompson4, Manuel Vogel4,5, and Wilfried Nörtershäuser1,5 — 1Universität Mainz, Germany — 2Universität Gießen, Germany — 3Stahl Electronics, Mettenheim, Germany — 4Imperial College London, England — 5GSI Darmstadt, Germany
Several precision experiments are under development within the framework of the new HITRAP facility at GSI Darmstadt. One of them is SPECTRAP, which aims to trap highly charged heavy ions in a Penning trap, cool them to cryogenic temperatures and measure their hyperfine structure by means of laser spectroscopy. This report presents the trapping technique and the methods used for detecting, cooling and manipulating the ions inside the trap before and during their excitation. Here for the first time resistive cooling is going to be applied to a large ion cloud (∼ 105 particles). Also considered are various problems arising from (non-perfect) vacuum, cryogenic environment, electronic noise, thermal shielding, etc. Finally, the current status and an overview of the planned experiments will be given.