Rostock 2019 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 3: Mass Spectrometry - Posters
MS 3.13: Poster
Dienstag, 12. März 2019, 16:30–18:15, S Fobau Physik
Towards parts per trillion mass measurements on light nuclei at LIONTRAP — Sascha Rau1, Fabian Heiße1,2, •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 6 meV/c2. However, five sigma discrepancies between high-precision measurements of these light nuclear masses question their current literature values [1] and give strong motivation for a new and independent experiment, the LIONTRAP (Light ION TRAP) apparatus, aiming for relative uncertainties of a few parts per trillion. The results of the first measurement campaign on the proton mass [2] and the complete setup will be presented, which includes several new developments, e.g. a doubly compensated Penning trap, an in-situ B2 shim coil, various precisely tuned detection systems and a simultaneous phase-sensitive measurement technique with two neighbouring ion traps.
J. A. Smith et al., Phys. Rev. Lett. 120, 143002 (2018)
F. Heiße et al., Phys. Rev. Lett. 119, 033001 (2017)