Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Instrumentation IX

HK 37.4: Vortrag

Mittwoch, 16. März 2016, 15:00–15:15, S1/01 A3

ALIVE - Collinear Laser Spectroscopy as a tool to measure high voltages with ppm accuracy — Phillip Imgram, Kristian König, •Jörg Krämer, Bernhard Maass, Ratajczyk Tim, Johannes Ullmann, and Wilfried Nörtershäuser — Institut für Kernphysik, Technische Universität Darmstadt

Whenever beams of charged particles are involved in a nuclear physics experiment, also high voltages are involved. In some cases the limited accuracy of high voltage measurements directly spoils the relevance of experimental data. Measuring high voltages with the best-possible accuracy is therefore essential. Collinear laser spectroscopy has become a standard technique for the determination of nuclear charge radii, spins, and magnetic moments. While this technique involves the Doppler shift of the incident laser frequency in the ion’s rest frame it is sensitive to the ion velocity and hence, the high voltage applied to accelerate the ions. We want to make use of this feature by determining the high voltage with very high accuracy employing a well-known atomic system and a pump/probe scheme. Accuracies of the order of 1 ppm are feasible. We will present the current status of the setup and the results of test measurements with Ca⁺ ions.