Extremely cold positrons accumulated electronically in ultrahigh vacuum

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


Many cold positrons in ultrahigh vacuum are required to produce cold antihydrogen, to cool highly stripped ions, and for ultracold plasma studies. Up to 3.5×104 such positrons have now been accumulated into the ultrahigh vacuum of a 4.2 K Penning trap, at a rate exceeding 103/h. 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 temperatures in high vacuum. The cooling of high energy positrons (from 22Na decay) in a tungsten crystal near the trap, together with purely electronic trapping and damping, is the key to the efficient accumulation and to projected improvements.

Original languageEnglish (US)
Pages (from-to)806-809
Number of pages4
JournalPhysical review letters
Issue number5
StatePublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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