Freiburg 2024 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 3: Accelerator Mass Spectrometry I

MS 3.5: Talk

Tuesday, March 12, 2024, 12:15–12:30, HS 3042

Current status of ALIS - The new low-energy isobar suppression setup at CologneAMS — •Markus Schiffer¹, Oscar Marchhart^1,2,3, Elisa Linnartz¹, Martin Martschini², Gereon Hackenberg¹, Peter Steier², Melisa Maslo⁴, Timm-Florian Pabst¹, Erik Strub⁴, Tibor Dunai⁵, Robin Golser², and Dennis Mücher¹ — ¹University 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 — ⁴University of Cologne, Division of Nuclear Chemistry, Cologne, Germany — ⁵University of Cologne, Institute of Geology and Mineralogy, Cologne, Germany

The integration of a unique low-energy isobar suppression unit, the Anion Laser Isobar Separator (ALIS), marked a significant extension to the Cologne 6 MV AMS-System. After the successful test of the advanced gas-filled radio frequency quadrupole (RFQ) ion cooler at the Vienna test bench, we present insights from the first benchmark tests conducted at ALIS.

Our efforts focused on performance tests of the 134 sample MC-SNICS ion source and to verify its reliability, specifically for the extraction of SrF₃⁻. The recent implementation of a beam attenuator has facilitated the injection of stable ion beams into the RFQ.

Additionally, we have integrated an 18 W 532 nm continuous wave laser for photodetachment of isobar anions, in compliance with German regulatory standards.

Keywords: AMS; ALIS; CologneAMS; ion cooler; low-energy isobar suppression