Tritium ion blocking and detection in the KATRIN experiment

Manuel Klein, Ferenc Glück
2017 Journal of Physics, Conference Series  
The aim of the KATRIN experiment is to determine the absolute neutrino mass scale in a model independent way by measuring the electron energy spectrum shape near the endpoint of molecular tritium beta decay. The beta electrons are guided from the source to the spectrometers by a high magnetic field. The beta decays and ionisations of the beta electrons in the source produce a variety of positive tritium ions that are not allowed to reach the spectrometers. Therefore they will be blocked by a
more » ... be blocked by a positive potential and removed by dipole electrodes in the beam transport system. Various ion detection methods (Faraday cup, FT-ICR and ionisation of the residual gas in the spectrometers) will be used to test the ion blocking and removal efficiency.
doi:10.1088/1742-6596/888/1/012073 fatcat:cs5tuxcylzalphcicvpkiojbve