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 Marchhart^2,3, Gereon Hackenberg¹, Peter Steier², Alfred Priller², Susan Herb¹, Timm-Florian Pabst¹, Elisa Chopan¹, Carlo Baddeliyanage¹, Martin Martschini², Robin Golser², Alfred Dewald¹, 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

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.