Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-10-25
Physics
High Energy Physics
High Energy Physics - Experiment
Submitted for the SUSY07 proceedings
Scientific paper
Recent neutrino mass experiments at Mainz and Troitsk using tritium beta-decay have reached their sensitivity potential, yielding upper limits of about 2 eV/c^2 for the electron antineutrino mass. The KArlsruhe TRItium Neutrino experiment (KATRIN), designed to reach a sensitivity of 0.2 eV/c^2 (90% C.L.), will improve the signal rate by a factor of about 100 with respect to previous experiments while maintaining the same low background level at an enhanced energy resolution of 0.93 eV of the spectrometer which is scaled up by a factor of 10 in linear dimensions. This low background rate can only be achieved by active and passive reduction of the background components induced by the spectrometer itself and in the detector region. Furthermore, sources of systematic errors such as energy losses inside the tritium source or fluctuations of the energy scale of the spectrometer need to be carefully controlled and analysed. An overview of KATRIN's method to reduce the background rate and to determine the systematics as well as the sensitivity on the neutrino mass will be presented.
KATRIN collaboration for the
Valerius Kathrin
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