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MS: Fachverband Massenspektrometrie
MS 7: Poster
MS 7.1: Poster
Tuesday, March 3, 2009, 16:00–18:00, VMP 9 Poster
The MPIK/UW-PTMS: a tool for a precision measurement of the 3H/3He mass ratio — •Christoph Diehl1,2, David Pinegar1, Robert Van Dyck Jr.3, and Klaus Blaum1,2 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Physikalisches Institut, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany — 3Department of Physics, University of Washington, Seattle, WA 98195-1560, USA
The MPIK/UW-PTMS (Max-Planck-Institut für Kernphysik/University of Washington-Penning trap mass spectrometer) is a high precision tool for the measurement of the 3H/3He mass ratio. A determination of this ratio to a precision of 1 part in 1011 would help the data analysis of the KATRIN (Karlsruhe tritium neutrino) experiment. The spectrometer was developed at the University of Washington, Seattle and is set up again at the Max-Planck-Institut für Kernphysik in Heidelberg. We present our measurement principle together with newly developed techniques. To minimize contaminations an external Penning ion source is utilized. The mass measurements are performed in a double Penning trap sitting in an ultrastable (field drift of only 17 ppt/h) 6-T magnet, where both a single ion of 3H and 3He will be stored and their masses are alternately measured. This will help to suppress long-term drift effects in the electric and magnetic fields of the spectrometer. The experiment is completely installed in Heidelberg and starts measurements in 2009.