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An experiment for the direct determination of the g-factor of a single proton in a Penning trap

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30950

Rodegheri,  Cricia C.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30312

Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30722

Kreim,  Susanne Waltraud
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31126

Ulmer,  Stefan
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Rodegheri, C. C., Blaum, K., Kracke, H., Kreim, S. W., Mooser, A., Quint, W., et al. (2012). An experiment for the direct determination of the g-factor of a single proton in a Penning trap. New Journal of Physics, 14(June 2012): 063011, pp. 1-33. doi:10.1088/1367-2630/14/6/063011.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-A32D-8
Abstract
A new apparatus has been designed that aims at a direct precision measurement of the g-factor of a single isolated proton or antiproton in a Penning trap. We present a thorough discussion on the trap design and a method for the experimental trap optimization using a single stored proton. A first attempt at the g-factor determination has been made in a section of the trap with a magnetic bottle. The Larmor frequency of the proton has been measured with a relative uncertainty of 1.8 × 10−6 and the magnetic moment has been determined with a relative uncertainty of 8.9 × 10−6. A g-factor of 5.585 696(50) has been obtained, which is in excellent agreement with previous measurements and predictions. Future experiments shall drive the spin-flip transition in a section of the trap with a homogeneous magnetic field. This has the potential to improve the precision of the measured g-factor of the proton and the antiproton by several orders of magnitude.