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Hannover 2016 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 7: Accelerator Mass Spectrometry and Applications I

MS 7.1: Invited Talk

Thursday, March 3, 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 Golser11VERA 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.

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