Electronic accumulation of extremely cold positrons in ultrahigh vacuum

K. Abdullah, L. Haarsma*, G. Gabrielse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Many cold positrons in ultrahigh vacuum are required to produce cold antihydrogen, to cool highly stripped ions, and to study ultracold plasmas. Up to 3.5 x 104 such positrons have now been accumulated into the ultra-high vacuum of a 4.2 K Penning trap, at a rate exceeding 103/hr. Both the accumulation rate (per high energy positron incident at the trap), and the number accumulated, are much larger than ever before realized at low tem-peratures in high vacuum. Cooling of high energy positrons (from22Na decay) in a tungsten crystal near the trap, together with purely electronic trapping and damping, are key to the efficient accumulation and to pro-jected improvements.

Original languageEnglish (US)
Pages (from-to)337-340
Number of pages4
JournalPhysica Scripta
Issue numberT59
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)


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