Contribution Poster direct neutrino mass
Calibration strategy and status of tritium purity monitoring for KATRIN
- Mr. Simon NIEMES
- Mr. Genrich ZELLER
- Mr. Magnus SCHLÖSSER (KIT)
for the KATRIN collaboration
Session and Location
Monday Session, Poster Wall #27 (Robert-Schumann-Room)
The KATRIN (Karlsruhe Tritium Neutrino) experiment aims to measure the mass of the electron anti-neutrino with a sensitivity of 200 meV/$c^2$ by measuring the spectrum of the beta electrons close to the kinematic endpoint region. For monitoring the isotopic composition in the gaseous tritium source a custom-made Laser-Raman-System (LARA) has been developed at the Tritium Laboratory Karlsruhe.
The two approaches used to calibrate the LARA system for trueness <3 % are: i) theoretical intensities together with a spectral intensity standard and ii) highly accurate gas mixtures. Latest efforts have improved the in-situ calibration via spectral standard with re-calculated theoretical uncertainties and uncertainty analysis. Recently, the TRIHYDE experiment has been setup which enables cross-checking of the calibration via gas mixtures of all six hydrogen isotopologues and further studies of systematic effects.
This poster presents the benefits and status of both complementary approaches.
Poster included in proceedings: