Two-symmetry Penning-Ioffe trap for antihydrogen cooling and spectroscopy

E. Tardiff, X. Fan, G. Gabrielse*, D. Grzonka, C. Hamley, E. A. Hessels, N. Jones, G. Khatri, W. S. Kolthammer, D. Martinez Zambrano, C. Meisenhelder, T. Morrison, E. Nottet, E. Novitski, C. H. Storry

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


High-accuracy spectroscopic comparisons of trapped antihydrogen atoms (H¯) and hydrogen atoms (H) promise to stringently test the fundamental CPT symmetry invariance of the standard model of particle physics. ATRAP's nested Penning-Ioffe trap was developed for such studies. The first of its unique features is that its magnetic Ioffe trap for H¯atoms can be switched between quadrupole and octupole symmetries. The second is that it allows laser and microwave access perpendicular to the central axis of the traps.


  • Antihydrogen
  • Ioffe Trap
  • Neutral Particle Trap

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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