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MS: Fachverband Massenspektrometrie
MS 2: Ionenfallen- und FT-IZR-MS, Moleküle, Cluster, Zerfälle und Reaktionen
MS 2.5: Talk
Monday, March 10, 2008, 17:45–18:00, 3E
Development of a FT-ICR detection system for KATRIN — •Marta U. Diaz1, Klaus Blaum1,2, Jochen Bonn1, and Aleksandra Gotsova3 — 1Institute of Physics, D-55099, University of Mainz — 2GSI, D-64291 Darmstadt — 3Forschungszentrum Karlsruhe, D-76344, Eggenstein-Leopoldshafen
The KATRIN experiment, at Forschungszentrum Karlsruhe, is a next generation tritium β-decay experiment, designed to measure the mass of the electron neutrino directly with a sensitivity of 0.2 eV. It uses a Windowless Gaseous Tritium Source (WGTS) to determine the neutrino mass from the T2—→(3HeT)++e−+νe decay. The e− are guided by a strong magnetic field into the spectrometer where they get analysed. Tritium is removed from the system by differential pumping and cryogenic trapping. (3HeT)+ will dissociate and form clusters (T2n+1)+. The β-decay endpoint of these clusters differs from the endpoint of the T2 decay. The knowledge of the concentration of each cluster species is therefore essential to evaluate the β-spectrum. To measure these concentrations a Fourier-Transformation-Ion-Cyclotron-Resonance (FT-ICR) system is installed in the differential pumping system. The FT-ICR system, a cylindrical Penning trap setup with ≈75 mm diameter, is being developed at Johannes Gutenberg-Universität Mainz. The system to control the ion density consists of a first FT-ICR trap, an electric dipole, an electric potential barrier to block the ions, and a second FT-ICR trap. The layout of the setup and first results will be presented.