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MS: Fachverband Massenspektrometrie

MS 10: Accelerator Mass Spectrometry II

MS 10.2: Vortrag

Freitag, 14. März 2025, 11:30–11:45, HS 2 Chemie

Upgraded LE side of the 6 MV Tandem Accelerator — •Christof Vockenhuber, Matthias Schlomberg, Thorben Wulff, Urs Ramsberger, Lukas Wacker, and Marcus Christl — Laboratory of Ion Beam Physics, ETH Zürich, Switzerland

At ETH, six AMS facilities are in operation, spanning terminal voltages from as low as 50 kV up to 6 MV. In the past decades, the focus of the instrumental development at the laboratory had been on the small, compact AMS system with the aim of making AMS measurements easier, more affordable and more precise. Yet, a few radionuclides still need larger accelerators for sufficient isobar separation, such as Cl-36 or Si-32. Some of the developments at the small AMS systems can be beneficial for the larger machines. Based on these experience we have rebuilt the LE side of the 60-year-old 6 MV EN Tandem accelerator over the past two years. A key part is the MICADAS-type ion source with some refinements for the need of the radionuclides measured at this accelerator. Especially the target design and the target position system were improved. The upgraded system will be presented and the performance, in particular the ion source output and cross talk, for the key-radionuclide Cl-36 discussed.

Keywords: AMS, isobar separation, Cl-36, Si-32