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キーワード:
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MPINP:
Präzisionsexperimente - Abteilung Blaum
MPINP:
Expt. PENTATRAP - Abteilung Blaum
要旨:
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 163Ho using cryogenic microcalorimeters. Possible systematic shifts in the calorimetric measurements can originate from the decay of 163Ho 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 163Ho 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 163Ho, was developed for the creation of highly charged ions. For the Penningtrap 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 163Ho with the Penning-trap mass spectrometer Pentatrap as the main result of this thesis.
