Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 8: Poster HU 1
A 8.14: Poster
Samstag, 5. März 2005, 08:30–18:30, Poster HU
Laser spectroscopy of highly charged ions at the Heidelberg-EBIT — •Günter Brenner — Max-Planck-Institut für Kernphysik, Heidelberg
An experimental setup for high resolution laser spectroscopy of highly charged ions has been installed at the Heidelberg electron beam ion trap (EBIT). Heavy ions with few (or even only one electron) are ideal systems to investigate relativistic and nuclear size effects as well as QED in strong fields and to test the corresponding models. The combination of an EBIT and a tunable laser should provide very appropriate conditions for high-precision studies on trapped highly charged ions. A pulsed Nd:YAG laser is used to pump a tunable dye laser. The spectral range 210-800 nm can be accessed with a resolution of 0.04 cm−1. The laser beam is superimposed axially upon the trapped ion cloud by means of off-axis parabolic mirrors inside a complex UHV vacuum chamber. The Fluorescence detection system uses both a cooled photomultiplier and large area photodiode. The setup went through initial tests and adjustments under ion trapping conditions and is now beeing optimized to reduce scattered light which currently hinder the detection of the fluorescence signal.