SAMOP 2023 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 1: Accelerator Mass Spectrometry I

MS 1.2: Talk

Tuesday, March 7, 2023, 11:30–11:45, F128

Thickness measurement of thin foils using a Time of Flight spectrometer — •Elisa Chopan, Gereon Hackenberg, Markus Schiffer, Stefan Heinze, Martina Gwozdz, Timm-Florian Pabst, Carlo Baddeliyanage, Tom Sittig, Alfred Dewald, and Dennis Mücher — Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Deutschland

In many nuclear physics experiments, a target foil is shot at, whereby the precise thickness is often unknown. A Time of Flight setup at the AMS setup of the Cologne FN tandem accelerator (10 MV) was established, with which the thickness of thin target foils can be determined. The setup can use ions of different charges and energies to measure the ToF between a start and stop detector. The foil of interest is placed in front of the start and stop detector and hence induces an energy loss of the ions. Using known stopping powers then allows to determine the thickness of the foil. In this contribution, we present the setup consisting of multichannel plate (MCP) detectors and show the achieved accuracy for different combinations of foils and ions. We have found good agreement of our results with measurements using standard techniques.