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SAMOP 2023 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 1: Accelerator Mass Spectrometry I

MS 1.6: Talk

Tuesday, March 7, 2023, 12:30–12:45, F128

The Anion Laser Isobar Separator - ALIS — •Markus Schiffer1, Oscar Marchhart2,3, Gereon Hackenberg1, Peter Steier2, Alfred Priller2, Susan Herb1, Timm-Florian Pabst1, Elisa Chopan1, Carlo Baddeliyanage1, Martin Martschini2, Robin Golser2, Alfred Dewald1, and Dennis Mücher11University of Cologne, Institute of Nuclear Physics, Cologne, Germany — 2University of Vienna, Faculty of Physics, Isotope Physics, Vienna, Austria — 3University of Vienna, Vienna Doctoral School in Physics, Vienna, Austria

Low energy isobar suppression has taken on increasing importance and has demonstrated a new access to environmental (90Sr, 135Cs), and cosmogenic isotopes (26Al, 41Ca). For this purpose, a new injector for the Cologne 6 MV AMS-System was developed. This "Anion Laser Isobar Separator" (ALIS) uses an advanced gas-filled radio frequency quadrupole (RFQ) ion cooler to suppress isobars by use of laser photodetachment in combination with gas reactions.

ALIS will use a 134 sample MC-SNICS ion source and a double focusing magnet for the ion cooler injection. The system is designed to separate the ion beam by slits before it is focused into the deceleration section of the RFQ. The ion cooler extraction section is designed to couple the ion beam to the ion optics of the AMS-System, or alternatively to a diagnose setup for stand-alone operation. For the element selective isobar suppression by laser photodetachment a 532 nm continuous wave laser with 18 W will be used.

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