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MS: Fachverband Massenspektrometrie
MS 9: Mass Spectrometry Posters
MS 9.1: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
LIONTRAP - A High-Precision Mass Spectrometer — Sascha Rau1, Sangeetha Sasidharan1, Fabian Heisse1, •Florian Köhler-Langes1, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2GSI-Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany
The precise knowledge of the atomic masses of various light nuclei, e.g. of the proton, deuteron, helion and triton, is of great importance for several tests of fundamental physics. For example, the mass of the proton is an important input parameter for hydrogen spectroscopy. Furthermore, an essential consistency check of the KATRIN experiment will require an ultra-precise measurement of the mass difference of triton and helion on a so far unrivalled level of precision of 30 meV/c2. However, five sigma discrepancies between high-precision measurements of these light nuclear masses question their current literature values. They give strong motivation for a new and independent experiment, the LIONTRAP (Light ION TRAP) apparatus [1], aiming for relative uncertainties of a few parts per trillion. Several setup highlights like the doubly compensated Penning trap, an in-situ B2 shim coil, various precisely tuned detection systems and an online-tunable trap tilt are presented on the poster. Furthermore, the proton mass campaign (δ mp/mp=3·10−11) [2], the current measurement campaign on deuteron and future plans on the helion and triton masses are explained. [1] F. Heiße et al., Phys. Rev. A 100, 022518 (2019) [2] F. Heiße et al., Phys. Rev. Lett. 119, 033001 (2017)