Electron-cooled accumulation of 4 × 109 positrons for production and storage of antihydrogen atoms

D. W. Fitzakerley, M. C. George, E. A. Hessels, T. D G Skinner, C. H. Storry, M. Weel, G. Gabrielse, C. D. Hamley, N. Jones, K. Marable, E. Tardiff, D. Grzonka, W. Oelert, M. Zielinski

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Four billion positrons (e+) are accumulated in a Penning-Ioffe trap apparatus at 1.2 K and <6 ×10-17 Torr. This is the largest number of positrons ever held in a Penning trap. The e+ are cooled by collisions with trapped electrons (e-) in this first demonstration of using e- for efficient loading of e+ into a Penning trap. The combined low temperature and vacuum pressure provide an environment suitable for antihydrogen () production, and long antimatter storage times, sufficient for high-precision tests of antimatter gravity and of CPT.

Original languageEnglish (US)
Article number064001
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number6
StatePublished - Feb 23 2016


  • Penning trap
  • antihydrogen
  • positrons

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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