Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Precision spectroscopy of atoms and ions (with Q)
A 30.5: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
Laser system for Precise High Voltage measurements — •Tim Ratajczyk, Phillip Imgram, Kristian König, Jörg Krämer, Bernhard Maaß, Johannes Ullmann, and Wilfried Nörtershäuser — Institut für Kernphysik, TU Darmstadt
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 [1]. The aim is to achieve a precision of at least 1 ppm, which is of interest for many applications.
For first experiments using a 40Ca+ beam, a diode laser based system has been established. The well-known 4s1/2 → 4p3/2 transition is used to identify the ion velocity by the Doppler shift. The laser system consists of an external cavity diode laser at 786 nm in combination with a tapered amplifier to provide a narrow bandwidth beam with sufficient power for frequency doubling in an LBO crystal. We present the current status of the experiment and an outlook for the laser system that will be used for spectroscopy on indium.
[1] O. Poulsen, Nuclear Instruments & Methods in Physics Research 202 (1982) 503.