Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 4: Precision Spectroscopy I
A 4.6: Talk
Monday, March 6, 2017, 16:00–16:15, N 3
Proof of concept of Precise High Voltage measurements by collinear laser spectroscopy — •Tim Ratajczyk1, Kristian König1, Christopher Geppert2, Phillip Imgram1, Bernhard Maaß1, Ernst Otten3, Johannes Ullmann1, Jörg Krämer1, 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 goal 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 as it has been suggested in [1]. The aim is to achieve an accuracy of 1 ppm, which is of interest for many applications.
First measurements have been performed to test collinear laser spectroscopy with a new two chamber approach as a high voltage standard. To show the feasibility of this concept the well-known 4s1/2 -> 4p3/2 transition of 40Ca+ was used to mark a velocity class with a narrow bandwidth laser, as the multiply excited ions decay into the meta stable 3d5/2 state. The marked ions are accelerated by the unknown static high voltage and can be probed by re-exciting them from the 3d5/2 state. The shift of the resonance frequency introduced by the Doppler effect is then used to refer the high-voltage measurement to a high accuracy frequency measurement. First results will be presented.
[1] O. Poulsen, Nuclear Instruments & Methods in Physics Research 202 (1982) 503.