"GSI-Kolloquium anlässlich der Verleihung des GSI-Doktorandenpreises 2013"

"Collinear Laser Spectroscopy - From Nuclear Structure to Precision Tests and Metrology." Collinear laser spectroscopy is a powerful tool to perform accurate measurements on short-lived and exotic systems. It is now applied at many on-line facilities with low-energy beams to determine nuclear charge radii, spins and electromagnetic moments of short-lived isotopes. The technique provides high resolution due to the reduction of the Doppler-width after electrostatic acceleration. Collinear laser spectroscopy at storage rings - on the other hand - is attractive because of the relativistic speed of the ions and the availability of highly charged heavy ions. It allows, e.g., for tests of fundamental symmetries. Recent experiments at GSI have focussed on a test of Time Dilation in Special Relativity and spectroscopy on hydrogen- and lithium-like ions to test Quantum Electrodynamics in the strongest magnetic fields available in the laboratory. In my talk I will present the principles of collinear laser spectroscopy and some of the recent highlights achieved in the different fields as well as an outlook for future applications at FAIR and in metrology.