Sack, Rudolf: Measurement of the energy loss of 18.6 keV electrons on deuterium gas and determination of the tritium Q-value at the KATRIN experiment. 2020
Inhalt
- Abstract
- Abstract (deutsch)
- Summary
- Zusammenfassung
- Neutrino physics
- Postulation and discovery
- Neutrinos in the Standard Model
- Neutrino oscillation
- Neutrino mass theory
- Neutrino mass determination
- KATRIN experiment
- Measurement principle
- Tritium beta spectrum
- MAC-E-Filter
- Electric filtering
- Magnetic adiabatic collimation
- Energy resolution
- Magnetic mirror
- Magnetic flux tube
- Transmission of the main spectrometer
- Background of the main spectrometer
- Source and transport section (STS)
- Stability of the source
- Transport section
- Spectrometer and detector section (SDS)
- Pre spectrometer (PS)
- Main spectrometer (MS)
- Focal plane detector - FPD
- Monitor spectrometer - MoS
- High voltage at KATRIN
- Calibration and monitoring tools
- Precision photoelectron source
- Working principle and concept
- Description of the e-gun flange
- Optical components
- HV concept of the electron gun
- Measurements with the electron gun at a test stand
- Photoelectron gun in KATRIN:
- Energy loss due to scattering with D2 molecules
- Q-value of tritium
- Motivation to measure the Q-value
- Q-value from other experiments
- Endpoint and recoil
- Determination of Q(T2) in KATRIN
- Overview over the potentials in KATRIN
- Fowler method
- Corrections to the measured data
- Work function of the e-gun
- Determination of the spectrometer work function
- Stability of the work functions
- Work function of the rear wall
- Starting potential in the WGTS
- Q-value of tritium in the first tritium campaign
- Q-value of tritium in the first science run of KATRIN
- Possible plasma instabilities in KATRIN
- General introduction to plasma instabilities
- General Introduction
- Current driven instability in partially ionised media
- Plasma instability in the Whistler mode caused by a gyrating electron stream
- Two stream instability
- Appendix