German Title: Experimentelle Studien mit hochgeladenen Ionen in einer Penningfalle zur Messung magnetischer Momente von Elektronen mithilfe von Doppelresonanzspektroskopie
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Abstract
A precise measurement of bound-electron g factors in highly charged ions provides stringent tests for state-of-the-art theoretical calculations, such as relativistic electron-correlation, bound-state QED, and higher-order Zeeman effects. We excite the fine-structure transition of boronlike argon (40Ar13+) with laser radiation and probe microwave transitions between Zeeman sub-levels in the magnetic field of a Penning trap. From this laser-microwave double-resonance technique the g factor can be determined on a ppb level of accuracy in our apparatus. We have built a novel ’half-open’ Penning trap with high fluorescence-detection efficiency and an integrated electron-beam ion source for production of highly charged ions from gas, injected through a cryogenic valve. In the future, heavier ions shall be captured from the HITRAP facility at GSI and the method shall be applied to hyperfine-structure transitions of hydrogenlike bismuth (209Bi82+) in order to measure electronic and nuclear magnetic moments. This thesis presents experimental developments as well as production, cooling, transport, and long-term storage of highly charged argon ions.
Document type: | Dissertation |
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Supervisor: | Quint, PD Dr. rer. nat. Wolfgang |
Date of thesis defense: | 18 November 2015 |
Date Deposited: | 01 Dec 2015 10:53 |
Date: | 2015 |
Faculties / Institutes: | The Faculty of Physics and Astronomy > Institute of Physics |
DDC-classification: | 530 Physics |