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A: Fachverband Atomphysik

A 23: Precision spectroscopy II

A 23.4: Talk

Thursday, March 13, 2008, 14:45–15:00, 3C

A non-destructive detection of highly-charged ions for the measurement of the magnetic moment of the bound electron in ^40,48Ca^17+,19+ — •Sven Sturm¹, Klaus Blaum^1,2, Wolfgang Quint², Birgit Schabinger¹, Anke Wagner¹, and Günter Werth¹ — ¹Institute of Physics, Johannes Gutenberg-University, 55099 Mainz, Germany — ²GSI Darmstadt, 64291 Darmstadt, Germany

The high-precision measurement of the magnetic moment of the bound electron in highly-charged ions yields a stringent test for Bound-State quantum electrodynamical (BS-QED) calculations. Since the BS-QED contribution to the g-factor calculation increases with the nuclear charge, we plan to measure the g-factor of ^40,48Ca^17+,19+ ions stored in a triple-Penning trap system with a relative uncertainty of 10⁻⁹ using the “continuous Stern-Gerlach-effect” [1]. To this end, a novel Penning trap setup and highly sensitive detection methods at cryogenic temperatures have been developed and tested. The principle of the non-destructive detection technique for multi-species ion-clouds as well as single ions is introduced and recent results are presented.

[1] M. Vogel et al., Nucl. Inst. Meth. B 235, 7 (2005)