Accuracy of the Laser Raman system for KATRIN

Understand

The aim of the Karlsruhe Tritium Neutrino experiment (KATRIN) is the direct (model-independent) measurement of the neutrino mass.

• For that purpose a windowless gaseous tritium source is used, with a tritium throughput of 40 g/day.
• In order to reach the design sensitivity of 0.2 eV/c^{2} (90% C.L.) the key parameters of the tritium source, i.e.
• the gas inlet rate and the gas composition, have to be stabilized and monitored at the 0.1% level (1 sigma).