Köln 2025 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 6: Isobar Suppression Techniques

MS 6.3: Vortrag

Donnerstag, 13. März 2025, 11:45–12:00, HS 2 Chemie

New light in Cologne: low-energy isobar suppression for trace isotopes — •Markus Schiffer¹, Oscar Marchhart^1,2,3, Derin Schmidt¹, Ferhat Altun¹, Stefan Heinze¹, Natasha Kalanke¹, Martin Martschini², Timm-Florian Pabst¹, Peter Steier², Gereon Weingarten¹, Erik Strub⁴, Robin Golser², Tibor Dunai⁵, and Dennis Mücher¹ — ¹University of Cologne, Institute for Nuclear Physics, Germany — ²University of Vienna, Faculty of Physics, Isotope Physics, Austria — ³University of Vienna, Vienna Doctoral School in Physics, Vienna, Austria — ⁴University of Cologne, Institute for Nuclear Chemistry, Germany — ⁵University of Cologne, Institute for Geology and Mineralogy, Germany

CologneAMS has successfully implemented a new low-energy isobar suppression unit, the Anion Laser Isobar Separator (ALIS), to improve and expand the detection of trace amounts of isotopes for scientists that apply the AMS technique for their geologic, environmental, archaeological, nuclear chemical, and nuclear astrophysical research. The new infrastructure ALIS consists of four major sections: anion beam formation and mass selection, anion cooling and isobar suppression, ion-beam transport to the 6 MV AMS system and finally an 18 W 532 nm continuous wave laser. We will report on the detailed design and the status of ALIS. First beams are transmitted through ALIS and we will show initial physics cases, with a focus on geological and environmental aspects, that are feasible with the achieved transmissions and characteristics of the setup.

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