Collinear laser spectroscopy has been applied on beams of highly charged ions from the keV to the GeV range. Helium-like systems of light isotopes are studied at the Collinear Apparatus for Laser Spectroscopy and Applied Sience (COALA) at TU Darmstadt to extract nuclear charge radii of stable isotopes. This approach is based on nonrelativistic QED calculations with the highest currently achievable accuracy. At the Experimental Storage Ring (ESR) at GSI Darmstadt, heavy highly charged ions were studied to test QED in the strongest magnetic fields available in the laboratory. Here, laser spectrosocpy is performed on hyperfine transitions of hydrogen-like Bi82+ and lithium-like Bi80+ ions at about 70% of the speed of light. I will report on results from these experiments and provide an outlook for further studies on short-lived species and at higher accuracy.
FAIR-GSI PhD Award 2022
Presentation of award to Johannes Hornung (GSI & HI Jena)
by Paolo Giubellino (FAIR & GSI) and Daniel Sälzer (Pfeiffer Vacuum GmbH)
Talk by award recipient: Talk has to be cancelled
Johannes Hornung (GSI & HI Jena)
"Study of Preplasma Properties Using Time-Resolved Reflection Spectroscopy"
Wolfgang Quint
Carlo Ewerz