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Influence of the magnetic field on the transmission characteristics and the neutrino mass systematic of the KATRIN experiment

Erhard, Moritz Gérard


The thesis at hand has successfully investigated and characterized the extended magnet system of the KATRIN experiment and implemented a detailed simulation model to take into account all field contributions. A concise modeling and understanding of the magnetic field close to the analyzing plane is crucial for a precise measurement and analysis of the neutrino mass with a sensitivity of 200 meV (90 % C.L.). A key aspect of the work performed here is that the contributions of individual magnets to the field in the analyzing plane in the spectrometer have been identified for various configurations. Based on these measurements, the previously undetermined remaining magnetic background field could be quantified. The advanced magnetic field model of this thesis allows to significantly reduce previously unexplained field deviations, verified by an in-depth analysis of extensive transmission function measurements with an electron gun, offering a sharp energy distribution and small angular spread. Of key importance thereby was a precise reconstruction of the emitted electrons of the electron gun in Monte Carlo simulations and the implementation of a realistic electron spectrum of the electron gun in the analysis framework. ... mehr

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DOI: 10.5445/IR/1000065003
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik – Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Hochschulschrift
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-650034
KITopen-ID: 1000065003
Verlag Karlsruher Institut für Technologie (KIT)
Umfang XIV, 256 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Fakultät für Physik – Institut für Experimentelle Kernphysik (IEKP)
Prüfungsdaten 01.07.2016
Referent/Betreuer Drexlin, G.
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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