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MPINP:
Präzisionsexperimente - Abteilung Blaum
Abstract:
The Tritium-Helium-Trap (THe-Trap) is a Penning-trap mass spectrometer dedicated
to measure the mass ratio of tritium and helium-3 with a relative precision of 10-11. To
reach this precision, the properties of the Penning-trap must be understood very well.
Geometrical deviations from the ideal case cause higher-order components in the electrostatic
potential. Extended simulations have been carried out to investigate first the
dependence of the simulation tool Comsol Multiphysics on the resolution chosen and
then to quantify the higher-order terms. The simulations were successful and in good
agreement with the experimental observations. It was also possible to simulate the image
charge effect. The simulated image charge effect confirms the experimental value.
Similar investigations were performed to estimate the influence of the experimental
setup on the magnetic field. The influence of ferromagnetic materials was determined
reliably.
The final part of this thesis is the characterization of the external Penning-ion source.
For this, a new Faraday cup was designed and implemented. The new device can
measure an ion beam from the Penning-ion source and helps to improve their operating
parameters.
