Hannover 2010 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 9: Ionenfallen und FT-IZR-MS, Moleküle, Cluster und Reaktionen

MS 9.5: Vortrag

Freitag, 12. März 2010, 11:45–12:00, F 428

Status of a non-destructive broad-band FT-ICR detection system for the KATRIN experiment — •Marta Ubieto Díaz¹, R. Burcu Cakirli^1,2, Michael Heck¹, Daniel Rodríguez³, Stefan Stahl⁴, and Klaus Blaum¹ — ¹Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany — ²Department of Physics, University of Istanbul, Istanbul, Turkey — ³Departamento de Física Atómica Molecular y Nuclear, Universidad de Granada, 18071 Granada, Spain — ⁴Stahl Electronics. Kellerweg 23, 67528 Mettenheim, Germany

The KArlsruhe TRItium Neutrino experiment KATRIN aims at improving the upper limit of the mass of the electron antineutrino to about 0.2 eV (90% c.l.) by investigating the β-decay of tritium gas molecules T₂→(³HeT)⁺ + e⁻ + ν_e. The experiment is currently under construction to start first data taking in 2012. One source of systematic uncertainties in the KATRIN experiment is the formation of ion clusters when tritium decays and decay products interact with residual tritium molecules. It is essential to monitor the abundances of these clusters since they have different final state energies than tritium ions. For this purpose, a prototype of a cylindrical Penning trap has been constructed and tested at the Max-Planck-Institute for Nuclear Physics in Heidelberg (MPIK), which will be installed in the KATRIN beam line. This system employs the technique of Fourier-Transform Ion-Cyclotron-Resonance in order to measure the abundances of the different stored ion species. The status and results will be presented.