A broad-band FT-ICR Penning trap system for KATRIN Ubieto-Díaz, M. Rodríguez, Daniel Lukic, S. Nagy, Sz. Stahl, S. Blaum, K. Atomic masses Mass spectra Abundances Fourier-transform mass spectrometry Ion cyclotron resonance mass spectrometry 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 beta-decay of tritium gas molecules T(2) -> ((3)HeT)(+) + e(-) + (nu) over bar (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, 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. 2014-04-25T11:12:44Z 2014-04-25T11:12:44Z 2009 preprint Ubieto-Díaz, M.; et al. A broad-band FT-ICR Penning trap system for KATRIN. International Journal of Mass Spectrometry, 288(1-3): 1-5 (2009). [http://hdl.handle.net/10481/31426] 1387-3806 arXiv:0907.3458v1 http://hdl.handle.net/10481/31426 10.1016/j.ijms.2009.07.003 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Elsevier