Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 56: Astroteilchenphysik
HK 56.3: Vortrag
Freitag, 23. März 2012, 11:45–12:00, RW 3
Simulations on Neutrino Mass Measurements via Time-of-Flight by the KATRIN Experiment — •Nicholas Steinbrink, Volker Hannen, and Christian Weinheimer — Institut für Kernphysik, Wilhelm-Klemm-Str. 9, 48149 Münster
The KATRIN experiment aims to measure the neutrino mass scale with a sensitivity of 0.2 eV by scanning the endpoint of the beta spectrum of T2 using a high resolution and large acceptance electrostatic filter. In this talk an additional time-of-flight mode for the KATRIN main spectrometer will be discussed. The idea is that the time-of-flight senstivity on the spectral shape of the beta spectrum is enhanced at the endpoint with high retarding potentials. Thus the shape of the beta spectrum including the parameter "neutrino mass squared" could be determined by fitting the time-of-flight spectrum.
A simulation was performed in order to determine the statistical power of the method. This simulation was performed for the scenario of a non-existing hypothetical ’tagging’ device, delivering a start signal at the entrance of the spectrometer with minimal interference for an electron, as well for a pulsed filtering of the electron beam. It will be shown that the statistical uncertainty on m(ve)2 will improve if the time resolution and detecting efficiency are sufficient.
This work is supported by BMBF under contract number 05A11PM2.