Hannover 2016 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: Accelerator Mass Spectrometry and Applications I
MS 7.1: Hauptvortrag
Donnerstag, 3. März 2016, 11:00–11:30, f128
The ILIAS project - Isobar suppression in AMS by laser photodetachment — •Martin Martschini1, Pontus Andersson2, Oliver Forstner3, Dag Hanstorp4, Johannes Lachner1, Yuan Liu5, Tobias Moreau1, Johanna Pitters1,6, Alfred Priller1, Peter Steier1, and Robin Golser1 — 1VERA Laboratory, University of Vienna, Faculty of Physics, Austria — 2Earth and Space Sciences Department, Chalmers Technical University, Gothenburg, Sweden — 3Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany — 4Department of Physics, University of Gothenburg, Sweden — 5Oak Ridge National Laboratroy, Oak Ridge, USA — 6Beams Department, CERN
The ILIAS-project at the University of Vienna was initiated in 2010 to explore isobar suppression by selective laser photodetachment for future AMS purpose. A gas-filled radio frequency quadrupole is used to decelerate negative atomic and molecular ion beams from a cesium sputter source and thereby extend the ion laser interaction time. Following successful development and characterization of the RFQ cooler at a purpose-built test bench, the ILIAS cooler is currently moved to a new injector beamline at VERA. This will allow first applications of this novel technique at a state-of-the-art AMS facility.
Besides an overview of the project, the talk will highlight experimental results on the performance of the RFQ ion cooler. This includes the suppression of a 63Cu− test beam by more than 99.999% with a 532nm laser, optical filtering of MgO− and AlO− and comprehensive measurements of the ion residence time inside the RFQ ion cooler.