Frankfurt 2006 – scientific programme
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A: Atomphysik
A 1: Pr
äzisionsspektroskopie I
A 1.2: Talk
Monday, March 13, 2006, 10:55–11:10, H6
A miniature Electron-Beam Ion Source for in-trap charge breeding of highly charged ions — •Joseba Alonso1,2, Klaus Blaum1,2, Slobodan Djekic3, Hans-Jürgen Kluge2, Wolfgang Quint2, Birgit Schabinger1, Stefan Stahl3, Manuel Vogel2, and Günther Werth1 — 1Johannes Gutenberg-Universität Mainz, Germany — 2Gesellschaft für Schwerionenforschung, Darmstadt, — 3Stahl-Electronics, Mettenheim, Germany
Measurements of the anomalous magnetic moment of the electron bound in hydrogen-like ions with spinless nuclei have proven to be highly sensitive tests of corresponding calculations based on bound-state quantum electrodynamics (BS-QED). An experiment on hydrogen-like calcium 40Ca19+ is being prepared [1], which is expected to yield a precision in the order of 10−9 for the electronic g-factor. This experiment makes use of an in-trap electron-beam ion source (EBIS) in which the charge breeding of the ions is performed by electron-impact ionization and with which it is possible to measure the energy dependent cross-sections of such process [2]. The charge breeding technique and first results will be presented.
[1] M. Vogel et al., Nucl. Inst. Meth. B 235, 7 (2005)
[2] J. Alonso et al., accepted by Rev. Sci. Instr. (2005)