Hannover 2013 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 5: Resonance Ionisation MS, ICPMS and others II
MS 5.1: Hauptvortrag
Dienstag, 19. März 2013, 14:00–14:30, F 442
The ISOLDE Laser Ion Source and Trap (LIST): Towards Pure Ion Beams — •Daniel Fink1,2, Klaus Blaum2,3, Richard Catheral1, Valentin Fedosseev1, Alexander Gottberg1, Tobias Kron4, Bruce Marsh1, Sven Richter4, Ralf Erik Rossel1, Sebastian Rothe1, Thierry Stora1, and Klaus Wendt4 — 1CERN, Geneva, Switzerland — 2University of Heidelberg — 3Max-Planck-Institut für Kernphysik, Heidelberg — 4University of Mainz
The on-line isotope mass separator ISOLDE at CERN is a facility dedicated to the production of a large variety of radioactive ion beams. A high ionization efficiency combined with ultimate isotope selectivity is of utmost importance for all on-line experiments on exotic, short-lived radionuclides with the lowest production rates. The ionization technique that most closely meets this requirement is the element selective Resonance Ionization Laser Ion Source (RILIS). Unfortunately, even when the RILIS is used, many rare isotope beams produced at ISOLDE remain contaminated with surface ionized isobars. In order to suppress the surface ions, a radio-frequency quadrupole device known as the Laser Ion Source and Trap (LIST) has been developed at the University of Mainz and at CERN. After the first successful on-line test in 2011, the LIST was further improved in terms of efficiency, selectivity, and reliability through several off-line tests at Mainz University and at ISOLDE/CERN. In September 2012, the first on-line physics experiments to use the LIST took place at ISOLDE.
A summary of the LIST technology and the results of the on-line characterization and experiments are given.