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Hyperfine Interactions

, Volume 89, Issue 1, pp 371–380 | Cite as

Trapped positrons for antihydrogen

  • G. Gabrielse
  • L. Haarsma
  • K. Abdullah
Invited Papers Session 10. Positronium and Antihydrogen

Abstract

Positrons from a 12 mCi22Na source are slowed by a W(110) reflection moderator and then captured in a Penning trap, by damping their motion with a tuned circuit. Because of the stability of the Penning trap and the cryogenic ultra-high vacuum environment, we anticipate that positrons can be accumulated and stored indefinitely. A continuous loading rate of 0.14 e+/s is observed for 32 h in this initial demonstration. More than 1.6×104 positrons have thus been trapped and stored at 4 K, with improvements expected. The extremely high vacuum is required for compatibility with an existing antiproton trap, which has already held more than 105 antiprotons at 4 K, for producing antihydrogen at low temperatures. The extremely cold positrons in high vacuum may also prove to be useful for cooling highly stripped ions.

Keywords

Reflection Thin Film High Vacuum Initial Demonstration Reflection Moderator 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • G. Gabrielse
    • 1
  • L. Haarsma
    • 1
  • K. Abdullah
    • 1
  1. 1.Department of PhysicsHarvard UniversityCambridgeUSA

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