1995/06/30 by M. H. Holzscheiter, X. Feng, Xu Feng +8 · 1 citation
Engineering · Physics and Astronomy · #Annihilation #Antiproton #Atomic and Molecular Physics #Atomic physics #Dark Matter and Cosmic Phenomena #Electron #Meteorology #Nuclear physics #Penning trap #Photocathodes and Microchannel Plates #Physics #Proton #Trap (plumbing) #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/0375-9601(96)00189-2
published as Phys.Lett.A214:279,1996 · 12 pages, latex; 4 figures, uufiled. Slightly expanded discussion of expected energy dependence of annihilation cross section and rate, and of estimates of trap pressure, plus minor text improvements
arxiv created 1995/10/12 · openalex publication_date 1996/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Up to one million antiprotons from a single LEAR spill have been captured in a large Penning trap. Surprisingly, when the antiprotons are cooled to energies significantly below 1 eV, the annihilation rate falls below background. Thus, very long storage times for antiprotons have been demonstrated in the trap, even at the compromised vacuum conditions imposed by the experimental set up. The significance for future ultra-low energy experiments, including portable antiproton traps, is discussed.