PSAS 2012
International Conference on Precision Physics
of Simple Atomic Systems 2012
Eltville, Germany -
Information

Title:	Mr.
Family Name:	Lindenfels
First Name:	David
Gender:	male
E-Mail:	d.vonlindenfelsgsi.de
Affiliation for Badge:	GSI Darmstadt
Institute:	GSI Helmholtzzentrum für Schwerionenforschung GmbH
Address (Street):	Planckstr. 1
Postal Code, City:	64291 Darmstadt
Country:	Germany
Phone:	+49-6159-71-1387
Fax:	+49-6159-71-2901
Arrival Date:	June 10
Departure Date:	June 15
Excursion with Conference Dinner:	Selected
Payment:	Bank transfer to GSI
Title:	Bound electron g-Factor Measurement by Double-Resonance Spectroscopy of a Fine-Structure Transition - the ARTEMIS Project
Abstract:	The precise determination of bound-electron g-factors in highly-charged ions (e.g. boron-like argon Ar13+ and calcium Ca15+) provides a stringent test of bound-state QED in extreme fields and contributes to the determination of fundamental constants. We have prepared a cryogenic Penning trap that features interaction of ions with electromagnetic fields in the static (DC), radio frequency, microwave, and visible regime. We will excite the fine-structure transition 2 P 1/2 - 2 P 3/2 with laser radiation and probe microwave transitions between Zeeman sub-levels (in a laser-microwave double-resonance technique). The ion cyclotron resonance measures the static magnetic field. From this the electronic g-factor gJ can be determined on a parts-per-billion level of accuracy. The experiment is currently being set up for measurements with medium heavy ions, which we produce inside the trap vacuum chamber. In the future, the trap will be connected to the HITRAP beamline at GSI, and the method will be applied to hyperfine-structure transitions of hydrogen-like heavy ions in order to measure electronic and nuclear magnetic moments. In this contribution, we present the physics background, the measurement principle, and the current status of the experiment.

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