Cryogenic particle accumulation in ATRAP and the first antihydrogen production within a magnetic gradient trap for neutral antimatter

C. H. Storry*, A. Carew, D. Comeau, E. A. Hessels, M. Weel, M. C. George, D. Grzonka, W. Oelert, T. Sefzick, Z. Zhang, G. Gabrielse, P. Larochelle, D. LeSage, B. Levitt, W. S. Kolthammer, R. McConnell, P. Richerme, J. Wrubel, A. Speck, F. MarkertF. Nillius, M. Scheid, J. Walz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

ATRAP has made many important improvements since CERN's Antiproton Decelerator (AD) was restarted in 2006. These include substantial increases in the number of positrons (e+) and antiprotons (Pbars) used to make antihydrogen (Hbar) atoms, a new technique for loading electrons (e-) that are used to cool Pbars and e+, implementation of a completely new, larger and more robust apparatus in our second experimental zone and the inclusion of a quadrupole Ioffe trap intended to trap the coldest Hbar atoms produced. Using this new apparatus we have produced large numbers of Hbar atoms within a Penning trap that is located within this quadrupole Ioffe trap using a new technique which shows promise for producing even colder atoms. These observed Hbar atoms resolve a debate about whether positrons and antiprotons can be brought together to form atoms within the divergent magnetic fields of a quadrupole Ioffe trap.

Original languageEnglish (US)
Pages (from-to)254-265
Number of pages12
JournalAIP Conference Proceedings
Volume1037
DOIs
StatePublished - Dec 1 2008

Keywords

  • Antihydrogen
  • Antiproton decelerator (AD)
  • Antiprotons
  • Buffer gas positron accumulator
  • CERN
  • CPT test
  • Cryogenic penning trap
  • Ioffe trap
  • Photoelectrons
  • Positrons
  • Solid neon moderator
  • Trapping

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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