Hyperfine Interactions

, 194:93 | Cite as

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

  • C. C. Rodegheri
  • K. Blaum
  • H. Kracke
  • S. Kreim
  • A. Mooser
  • C. Mrozik
  • W. Quint
  • S. Ulmer
  • J. Walz
Open Access
Article

Abstract

The measurement and comparison of the magnetic moment (or g-factor) of the proton and antiproton provide a stringent experimental test of the CPT-theorem in the baryonic sector (Quint et al., Nucl Instrum Methods Phys Res, B 214:207, 2004). We present an experimental setup for the first direct high-precision measurement of the g-factor of a single isolated proton in a double cylindrical Penning trap. The application of the continuous Stern-Gerlach effect to detect quantum jumps between the two spin states of the particle, together with a novel trap design specially developed for this purpose, offers the possibility of measuring the magnetic moment not only of a single proton but also of a single antiproton. It is aimed to achieve a relative uncertainty of 10 − 9 or better. Preliminary results including mass spectra of particle clouds as well as single proton preparation and detection are shown.

Keywords

Penning trap Magnetic moment Antiproton CPT 

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Copyright information

© The Author(s) 2009

Authors and Affiliations

  • C. C. Rodegheri
    • 1
  • K. Blaum
    • 2
    • 3
  • H. Kracke
    • 1
  • S. Kreim
    • 1
  • A. Mooser
    • 1
  • C. Mrozik
    • 1
  • W. Quint
    • 3
    • 4
  • S. Ulmer
    • 1
    • 3
  • J. Walz
    • 1
  1. 1.Johannes Gutenberg-Universität MainzMainzGermany
  2. 2.Max-Planck-Institut für KernphysikHeidelbergGermany
  3. 3.Ruprecht-Karls-UniversitätHeidelbergGermany
  4. 4.GSI DarmstadtDarmstadtGermany

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