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Ein Experiment zur Bestimmung des g-Faktors des gebundenen Elektrons in wasserstoff- und lithiumähnlichen mittelschweren Ionen

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons30978

Schabinger,  Birgit
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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schabinger_diss.pdf
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Citation

Schabinger, B. (2011). Ein Experiment zur Bestimmung des g-Faktors des gebundenen Elektrons in wasserstoff- und lithiumähnlichen mittelschweren Ionen. PhD Thesis, Johannes Gutenberg-Universität, Mainz.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-3F4A-5
Abstract
This PhD thesis presents the development of the setup and first measurements towards the determination of the g-factor of an electron bound in hydrogen- and lithium-like medium-heavy ions. Bound-state quantum electrodynamic calculations can be tested by high-precision g-factor measurements. The measurements are done in a triple Penning trap setup. During this PhD thesis highly charged ions up to 28Si13+ are produced for the first time in a purpose-built electron-beam-ion-source/trap. To determine the g-factor the free cyclotron frequency and the Larmor frequency are required. The first one can be calculated from the ion’s three eigenfrequencies, which are measured in the so-called precision trap. Since the ion should not be lost during the measurements, the eigenfrequencies are measured non-destructively by coupling to a radiofrequency tank circuit. For the free cyclotron frequency a relative uncertainty of a few 10−9 has been achieved. To determine the Larmor frequency the electron’s spin direction in the magnetic field has to be known. The spin direction can be detected in the so-called analysis trap using the continuous Stern-Gerlach effect. Therefore a highly stable axial oscillation of the ion is required. To achieve this as well as high-precision measurements in the precision trap, both traps are characterized with regard to their electrical and magnetic properties during this theses.