Hyperfine Interactions

, Volume 212, Issue 1–3, pp 69–80 | Cite as

Towards the measurement of the ground-state hyperfine splitting of antihydrogen

  • Bertalan JuhászEmail author


The ASACUSA collaboration at the Antiproton Decelerator of CERN is planning to measure the ground-state hyperfine splitting of antihydrogen using an atomic beam line, which will consist of a superconducting cusp trap as a source of partially polarized antihydrogen atoms, a radiofrequency spin-flip cavity, a superconducting sextupole magnet as spin analyser, and an antihydrogen detector. This will be a measurement of the antiproton magnetic moment, and also a test of the CPT invariance. Monte Carlo simulations predict that the antihydrogen ground-state hyperfine splitting can be determined with a relative precision of better than ∼ 10 − 6. The first preliminary measurements of the hyperfine transitions will start in 2011.


Antihydrogen Spectroscopy Hyperfine splitting CPT symmetry 


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Stefan Meyer Institute for Subatomic PhysicsAustrian Academy of SciencesViennaAustria

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