Stuttgart 2012 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 1: Resonance Ionization MS, ICPMS and others I
MS 1.3: Talk
Monday, March 12, 2012, 11:15–11:30, V57.06
Progress of the ILIAS project for selective isobar suppression by Laser photodetachment — •Oliver Forstner1, Pontus Andersson1, Robin Golser1, Martin Martschini1, Alfred Priller1, Peter Steier1, Dag Hanstorp2, and Anton Lindahl2 — 1VERA Laboratory, Faculty of Physics, University of Vienna, Austria — 2Department of Physics, University of Gothenburg, Sweden
At the VERA Laboratory of the University of Vienna a test facility for studying selective isobar suppression of negative ions by Laser photodetachment is currently under construction. The ILIAS (Ion Laser InterAction Setup) test setup consists of a negative ion spectrometer providing mass separated beams of negatively charged atomic or molecular ions with energies up to 30 keV. The negative ions are produced in a Middleton type cesium sputter ion source. The mass selected ions are stopped in a gas-filled radio frequency quadrupole cooler where they overlap with a strong continuous wave Laser beam. By careful selection of the photon energy only unwanted isobars are neutralized while the isobar of interest remain as ions. With this scheme a selective suppression of isobars can be achieved.
After a description of the setup and a status report of the commissioning of the negative ion spectrometer, the progress of the construction of the RFQ cooler will be presented. As a future outlook the first photodetachment experiments with the RFQ cooler and a possible scheme for application of this new method to a 3 MV AMS facility will be described.