Hannover 2010 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 5: Präzisionsmassenspektrometrie und Anwendungen I

MS 5.4: Vortrag

Mittwoch, 10. März 2010, 15:15–15:30, F 428

Status of the 3H/3He mass ratio measurement — •Christoph Diehl1, Jochen Ketter1, Martin Höcker1, David B. Pinegar1, Sebastian Streubel1, Robert S. Van Dyck Jr.2, and Klaus Blaum11Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Department of Physics, University of Washington, Seattle, WA 98195-1560, USA

A precise determination of the 3H/3He mass ratio, and hence of the tritium Q-value, is of relevance for the determination of the electron antineutrino mass by the Karlsruhe Tritium Neutrino Experiment (KATRIN). In our double Penning trap mass spectrometer we aim to measure the mass ratio of 3H to its β-decay product 3He with an precision of 10−11 and below. The spectrometer, originally built at the University of Washington, is setup now in a new laboratory in Heidelberg, and first test measurements have been performed. Tests have focused on 12C4+ because it has the same mass-to-charge ratio as 3H and 3He. The new axial frequency lock loop performed well and first cyclotron resonances have been recorded with the new traps. Work continues towards the elimination of contaminations and the isolation of single ions.

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