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MS: Fachverband Massenspektrometrie

MS 1: Precision Mass Spectrometry and Fundamental Applications I

MS 1.4: Talk

Monday, February 29, 2016, 12:00–12:15, f128

Towards a mass ratio measurement of tritium and helium-3 at THe-Trap — •Tom Segal, Martin Höcker, Jochen Ketter, Marc Schuh, Sebastian Streubel, and Klaus Blaum — Max-Planck-Institut für Kernphysik Saupfercheckweg 1 69117 Heidelberg Germany

THe-Trap is a precision Penning-trap mass spectrometer [1] at the Max Planck Institute for Nuclear Physics (MPIK) in Heidelberg. It aims to measure the mass ratio of tritium to helium-3 with a relative uncertainty of a few tens parts per trillion (10ppt). This value will provide a systematic check for the KATRIN experiment, which seeks to measure the anti-electron neutrino’s mass. In 2014, in order to determine the systematic shifts occuring in the mass measurements, we measured the mass ratio of the non-mass doublet carbon-12 to oxygen-16 [2]. This measurement is one of the most precise mass measurements in the world [2]. In January 2015 our superconducting magnet quenched. Additional problems with the cryostat forced us to start a maintenace phase which lasted ten months. In October 2015 the magnet was successfuly charged and shimmed, and the experiment returned to a fully functioning state. In the talk we will present the current status of the experiment and ideas for future measurements.