Neutrino research with KATRIN

The KArlsruhe TRItium Neutrino Experiment (KATRIN) investigates the signature of the neutrino mass in the endpoint region of the tritium beta decay spectrum.
In KATRIN, a high-resolution electrostatic spectrometer with magnetic adiabatic collimation is combined with a gaseous molecular tritium source of high luminosity.
With the first 5% of the total expected data, a sub-eV sensitivity and an upper limit of 0.8 eV/c^2 (90% C.L.) has already been achieved.

This talk will give a global overview of the operation of the KATRIN experiment and the analysis of a larger data set with 25% of the KATRIN data showing improvements in signal-to-background ratio and systematics.