2014, XVI, 196 p. 116 illus., 108 illus. in color.
Springer eBooks may be purchased by end-customers only and are sold without copy protection (DRM free). Instead, all eBooks include personalized watermarks. This means you can read the Springer eBooks across numerous devices such as Laptops, eReaders, and tablets.
You can pay for Springer eBooks with Visa, Mastercard, American Express or Paypal.
After the purchase you can directly download the eBook file or read it online in our Springer eBook Reader. Furthermore your eBook will be stored in your MySpringer account. So you can always re-download your eBooks.
Nominated as an outstanding Ph.D. thesis by the Karlsruhe Institute of Technology, Germany
Outlines how to measure the fundamental neutrino mass scale by means of high-precision ß-spectroscopy
Gives a detailed introduction to the KATRIN experiment
Describes background processes initiated by trapped electrons in magnetic mirrors and by Penning traps
Describes a novel background reduction method using Electron Cyclotron Resonance
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.
Content Level »Research
Keywords »Direct Neutrino Mass Measurement - Electron Cyclotron Resonance - KASSIOPEIA Method - KATRIN Experiment - Low Background Tritium Spectroscopy - Tritium Beta Decay