Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Astroparticle Physics III
HK 49.4: Vortrag
Donnerstag, 17. März 2016, 15:15–15:30, S1/01 A02
Electron spectroscopy measurements with a shifted analyzing plane setting in the KATRIN main spectrometer — •Stephan Dyba for the KATRIN collaboration — Institut für Kernphysik, Uni Münster
With the KATRIN (KArlsruhe TRItium Neutrino) experiment the endpoint region of the tritium beta decay will be measured to determine the electron-neutrino mass with a sensitivity of 200 meV/c2 (90% C.L.). For the high precision which is needed to achieve the sub-eV range a MAC-E filter type spectrometer is used to analyze the electron energy.
To understand the various background contributions inside the spectrometer vessel different electric and magnetic field settings were investigated during the last commissioning phase.
This talk will focus on the so called shifted analyzing plane measurement in which the field settings were tuned in a way to provide non standard potential barriers within the spectrometer. The different settings allowed to perform a spectroscopic measurement, determining the energy spectrum of background electrons born within the spectrometer.
This project is supported by BMBF under contract number 05A11PM2.