Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 71: Niederenergie Neutrinophysik V
T 71.1: Gruppenbericht
Mittwoch, 11. März 2015, 16:45–17:05, I.13.70 (HS 27)
Results of the recent commissioning measurements of the KATRIN main spectrometer — •Florian Fränkle for the KATRIN collaboration — Karlsruhe Institute of Technology (KIT), Institut für Kernphysik (IKP)
The KArlsruhe TRItium Neutrino (KATRIN) experiment is a large-scale experiment for the model independent determination of the mass of electron anti-neutrinos with a sensitivity of 200 meV/c2. It investigates the kinematics of electrons from tritium beta decay close to the endpoint of the energy spectrum with a high-resolution electrostatic spectrometer (Δ E = 0.93 at 18.6 keV). Low statistics at the endpoint requires an equally low background rate below 0.01 counts per second.
The KATRIN measurement setup consists of a high luminosity windowless gaseous tritium source (WGTS), a magnetic electron transport system with differential and cryogenic pumping for tritium retention, and an electro-static spectrometer section (pre-spectrometer and main spectrometer) for energy analysis, followed by a segmented detector system for counting transmitted beta-electrons.
In order to investigate the backgrounds and transmission characteristics of the main spectrometer, a dedicated series of measurements - beginning in autumn 2014 - was performed. The talk will give an overview of the results from this recent measurement phase.