Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster Session I
A 20.45: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1
First results of a high-precision high-voltage measurement based on laser spectroscopy — •Phillip Imgram1, Christopher Geppert2, Kristian König1, Jörg Krämer1, Bernhard Maaß1, Ernst Otten3, Tim Ratajczyk1, Johannes Ullmann1, and Wilfried Nörtershäuser1 — 1Institut für Kernphysik, TU Darmstadt — 2Institut für Kernchemie, Johannes Gutenberg-Universität Mainz — 3Institut für Physik, Johannes Gutenberg-Universität Mainz
The ALIVE experiment at the TU Darmstadt is a new collinear laser spectroscopy setup. The purpose of the experiment is the measurement of high voltages in the range of 10 to 100 kV using precise laser spectroscopy of ions with a well-known transition frequency. Our aim is to achieve an accuracy of 1 ppm, which is of interest for many applications.
First experiments were done with a 40Ca+ beam. Here, the well-known 4S1/2 → 4 P3/2 transition was driven with a diode-laser based system to pump the atoms to the metastable 3D5/2 state to mark a velocity class. Probing was achieved by reexcitation to the 4P3/2 level with a Ti:Sa laser which was stabilized to a frequency comb and subsequent detection of fluorescence light from the decay to the ground state. In order to evaluate the laser-based high-voltage measurements, their results are compared to a direct measurement with a voltage divider that has an active thermal stabilization and reaches a relative precision of 10−5.
We will present the current status of the experiment with results from the measurements with 40Ca+ and an outlook for the future measurements with indium ions.