Most precise laser spectroscopic high-voltage measurements published

We have published the result of high-precision measurements of high-voltages up to 20000 V in the current issue of the Journal Metrologia. An accuracy of 5 ppm was realized at the ALIVE experiment using Ca⁺ ions. This is an improvement of a factor 20 compared to previous trials of laser-based high-voltage measurements.
More information can be found in the publication and in the press releases (in German) of TU Darmstadt and the idw. The photo shows the main authors of the study, Jörg Krämer (left) and Kristian König (right) in front of the collinear beamline (KOALA), which was used for the high-voltage measurements.