Dresden 2011 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: Resonance Ionization MS, REMPI, MALDI
MS 7.2: Vortrag
Mittwoch, 16. März 2011, 16:30–16:45, GÖR 229
Improving the Selectivity of the ISOLDE Resonance Ionization Laser Ion Source at CERN — •Daniel Fink1,2, Klaus Blaum2,3, Bernard Crepieux1, Valentine Fedosseev1, Bruce Marsh1, Christoph Mattolat4, Sebastian Raeder4, Sven Richter4, Sebastian Rothe1,4, Pekka Suominen1, and Klaus Wendt4 — 1CERN, Genève, Switzerland — 2Physikalisches Institut, Universität Heidelberg, Germany — 3Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 4Institut für Physik, Universität Mainz, Germany
The on-line isotope mass separator ISOLDE at CERN provides radioactive beams for various experiments in many fields of physics. Here, a high ion production rate and isotope selectivity are of utmost importance for on-line experiments with short-lived radionuclides. The most extensively used ionization technique at ISOLDE is the element selective Resonance Ionization Laser Ion Source (RILIS). Nevertheless, 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 is now ready for implementation at ISOLDE. First tests of the LIST coupled with a real target unit have been performed at the ISOLDE off-line mass separator producing ion beams of stable isotopes. The results of the latest studies and the stages of the implementation of the LIST and its electronics into the present ISOLDE target unit and front end are given.