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Q: Fachverband Quantenoptik und Photonik

Q 6: Precision Spectroscopy of Atoms and Ions I (with A)

Q 6.4: Vortrag

Montag, 23. März 2015, 12:15–12:30, C/HSW

ALIVE - Measuring High Voltage with ppm Accuracy using Collinear Laser Spectroscopy — •Jörg Krämer¹, Kristian König¹, Wilfried Nörtershäuser¹, Christopher Geppert², Ernst W. Otten³, and Johannes Ullmann¹ — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²Institut für Kernchemie, Universität Mainz — ³Institut für Physik, Universität Mainz

Collinear laser spectroscopy has widely been used for the determination of nuclear properties like spins, moments and charge radii in radioactive beam facilities world wide. To extract these properties from the hyperfine structure of atoms, knowledge of the acceleration voltage is essential which is measured using classical voltage dividers.

In our experiment we will use the inverse approach: We will probe ions with well-known properties and by calculating the actual Doppler shift of the transition frequency, we can determine the high voltage that was used to accelerate the ions. With our two-chamber approach we envisage to reach an accuracy of <1 ppm which would exceed the performance of state-of-the-art high accuracy high voltage dividers.

We will present the basic outline of the experiment with the two-chamber pump/probe scheme and give a status update.