Berlin 2014 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 3: Precision Mass Spectrometry 2
MS 3.4: Vortrag
Montag, 17. März 2014, 17:30–17:45, DO24 1.205
Progress at THe-Trap — •Martin Höcker1, Tommi Eronen1, Jochen Ketter1, Marc Schuh1, Sebastian Streubel1, Robert S. Van Dyck Jr.2, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Department of Physics, University of Washington, Seattle, WA 98195-1560
THe-Trap is a Penning-trap mass spectrometry experiment that is currently being set up to measure the atomic mass ratio of tritium and helium-3 with a relative uncertainty of 10−11. In 2013, the experiment’s first high-precision mass ratio measurement was performed on the ions 12C4+ and 16O5+. The carbon-12/oxygen-16 mass ratio is one of the most precisely determined mass ratios  and serves as a benchmark for the experiment. This measurement reached a statistical uncertainty of 6.3·10−11  and was limited by systematic frequency shifts  due to too high motional amplitudes.
In the following service cycle, the experiment was modified to address the shortcomings that were discovered in the 2013 ratio measurements. This talk summarizes the results of the 2013 measurements and introduces the upgrades to the experiment, including a new amplifier, a modified ion source, and an improved vacuum system.
 R. S. Van Dyck Jr. et al., Int. J. Mass Spectrom. (2006) 251:231–242
 S. Streubel et al., Appl. Phys. B, doi:10.1007/s00340-013-5669-x
 J. Ketter et al., Int. J. Mass Spectrom., doi:10.1016/j.ijms.2013.10.005