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Background Processes in the Electrostatic Spectrometers of the KATRIN Experiment

Background Processes in the Electrostatic Spectrometers of the KATRIN Experiment

by Susanne Mertens
Hardback
Publication Date: 06/11/2013
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Neutrinos continue to be the most mysterious and, arguably, the most fascinating particles of the Standard Model as their intrinsic properties such as absolute mass scale and CP properties are unknown. The open question of the absolute neutrino mass scale will be addressed with unprecedented accuracy by the Karlsruhe Tritium Neutrino (KATRIN) experiment, currently under construction. This thesis focusses on the spectrometer part of KATRIN and background processes therein. Various background sources such as small Penning traps, as well as nuclear decays from single radon atoms are fully characterized here for the first time. Most importantly, however, it was possible to reduce the background in the spectrometer by more than five orders of magnitude by eliminating Penning traps and by developing a completely new background reduction method by stochastically heating trapped electrons using electron cyclotron resonance (ECR). The work beautifully demonstrates that the obstacles and challenges in measuring the absolute mass scale of neutrinos can be met successfully if novel experimental tools (ECR) and novel computing methods (KASSIOPEIA) are combined to allow almost background-free tritium ss-spectroscopy.
ISBN:
9783319011769
9783319011769
Category:
Mathematical physics
Format:
Hardback
Publication Date:
06-11-2013
Language:
English
Publisher:
Springer International Publishing AG
Country of origin:
Switzerland
Pages:
196
Dimensions (mm):
235x155x13mm
Weight:
4.44kg

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