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Abstract:
Precision spectroscopy of forbidden optical transitions in highly charged ions is of
particular interest for fundamental physics research as well as metrology. Due to the
lack of suitable cooling transitions in highly charged ions, they must be cooled by
means of the sympathetic cooling technique to obtain cryogenic temperatures. This
master thesis deals with the injection and storage of highly charged Ar13+ ions in the
cryogenic Paul trap CryPTEx (Cryogenic Paul Trap Experiment). For this purpose,
the ions are produced in and extracted from an electron beam ion trap (EBIT).
Storage times of up to 70 ms were succesfully demonstrated within the Paul trap.
This is a prerequisite for the implantation of the ions into a Be+-coulomb crystal
which is used for sympathetic cooling of the Ar13+ ions. The process of injection
and storage is described by simulations. For extraction and further investigation
of the stored ions, an electrostatic detector and energy sensitive detector has been
constructed.
The second part of this thesis is about three-dimensional (3D-) imaging of Be+
coulomb crystals with a plenoptic camera. The camera setup is developed in this
thesis and could be tested in a similar testsetup. This type of imaging is of particular
interest for understanding the spatial structure of 3D Be+-coulomb crystals with
individually implanted highly charged ions and as input for molecular-dynamics
simulations.
