SAMOP 2023 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 1: Accelerator Mass Spectrometry I
MS 1.3: Talk
Tuesday, March 7, 2023, 11:45–12:00, F128
Status of the advanced radiofrequency quadrupole for AMS - first results from the test bench setup of VERA — •Oscar Marchhart1,2, Markus Schiffer3, Alfred Priller1, Susan Herb3, Peter Steier1, Gereon Hackenberg3, Martin Martschini1, Dennis Mücher3, Alfred Dewald3, and Robin Golser1 — 1University of Vienna, Faculty of Physics, Isotope Physics, Vienna, Austria — 2University of Vienna, Vienna Doctoral School in Physics, Vienna, Austria — 3University of Cologne, Institute for Nuclear Physics, Cologne, Germany
Accelerator Mass Spectrometry (AMS) is the most sensitive method for the detection of trace amounts of long-lived radionuclides. The Ion-Laser InterAction Mass Spectrometry (ILIAMS) setup at the Environmental Research Accelerator (VERA) has demonstrated great isobar suppression capabilities using laser photodetachment in a gas-filled radiofrequency quadrupole (RFQ). With the ILIAMS technique, new AMS isotopes for research on environmental radioactivity (90Sr, 135Cs) and astrophysics (182Hf) become accessible.
An advanced RFQ ion cooler based on ILIAMS has been developed and built. Its performance is currently being studied at the test bench setup of VERA. The new design consists of elliptically shaped injection and extraction electrodes and a new guiding field structure that uses hybrid-electrodes. These changes intend to solve the technical challenges of decelerating and trapping ion beams with high emittance which typically arise when using fluoride anions like SrF3− and result in significant transmission losses up to 90%.