TY  - GEN
Y1  - 2024///
ID  - heidok34804
CY  - Heidelberg
N2  - The ECHo and HOLMES experiments investigate the effective electron neutrino mass following the least model-dependent approach by studying the kinematic of the electron capture in 163-Ho using cryogenic microcalorimeters.
Possible systematic shifts in the calorimetric measurements can originate from the decay of 163-Ho within the solid gold absorber material of the calorimeter.
In order to assess if such a systematic shift is present on the current sensitivity level of those experiments, the Q-value of this decay from microcalorimetry is compared to an independently measured one.
This cumulative thesis is based on the experimental developments towards and the independent measurement of the Q-value of 163-Ho electron capture using Penning-trap mass spectrometry.
In the first part of this thesis, an injection system for an electron beam ion trap capable of operating with rare isotopes, specifically the artificially produced 163-Ho, was developed for the creation of highly charged ions.
For the Penning-trap measurement, a single highly charged ion in the correct charge state is required and has to be selected from the different charge states produced within in the electron beam ion trap.
A Bradbury-Nielsen gate and a very fast high-voltage push-pull switch based on silicon carbide MOSFETs was developed within this thesis to separate the different charge states according to their time-of-flight in the beamline following the electron beam ion trap.
These technical developments allowed a measurement of the Q-value of 163-Ho with the Penning-trap mass spectrometer PENTATRAP as the main result of this thesis.
KW  - Penning trap
KW  -  Q-value
KW  -  neutrino mass
AV  - public
TI  - High-precision Penning-trap determination of the electron capture Q-value in 163-Ho for the determination of the electron neutrino mass
A1  - Schweiger, Christoph
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/34804/
ER  -