Hyperfine Interactions

, Volume 100, Issue 1, pp 91–101 | Cite as

Designing an RFQ ring trap for antiproton confinement and trapping and laser cooling Mg+ ions

  • X. Feng
  • M. Rathlev
  • J. Hangst
  • H. Knudsen
  • M. H. Holzscheiter


In the true sense of Bernie's approach to physics, an old idea (the Radiofrequency Quadrupole Trap) was taken and upgraded to be applied to a new area of physics (formation of an antihydrogen beam). During the course of the development work, new applications were identified and immediately put to use. While the collaboration is still pursuing its original goal, formation of antihydrogen by “Bernie's reaction”, collisions between positronium atoms and antiprotons, many new experiments have been found possible and are actively pursued. These include atomic and nuclear physics studies with ultra-low energy antiprotons ejected from the initial catching trap of the antihydrogen project, and the formation and study of exotic atoms and molecules in ultra-thin targets using trapped antiprotons (an extension of the work by the PS205 collaboration at CERN described elsewhere in this volume [10]). A large physics community has grown around these ideas and may even succeed in obtaining its very own antiproton source, which is a true sign of the recognition of the importance of this field. The work in this area will hopefully continue for many years to come, but we will truly miss the motivation and drive of our friend and colleague, Bernie Deutch.


Physics Community Physic Study True Sign Antihydrogen Laser Cool 
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  1. [1]
    W. Paul, O. Osberghaus and E. Fischer, Ein Ionenkäfig, Forschungsberichte des Wirtschafts- und Verkehrsministeriums, Nordrhein-Westfalen, vol. 415 (1958) p. 1.Google Scholar
  2. [2]
    D.J. Wineland, W.M. Itano and R.S. van Dyck, Jr., Adv. At. Mo. Phys. 19(1983)135.Google Scholar
  3. [3]
    M.G. Raizen, J.M. Gilligan, J.C. Bergquist, W.M. Itano and D.J. Wineland, Phys. Rev. A 45(1992) 6493.Google Scholar
  4. [4]
    F. Diedrich, E. Peik, J.M. Chen, W. Quint and H. Walther, Phys. Rev. Lett. 59(1988)2931.Google Scholar
  5. [5]
    B.I. Deutch, L.H. Andersen, P. Hvelplund, F.M. Jacobsen, H. Knudsen, M.H. Holzscheiter, M. Charlton and G. Laricchia, Hyp. Int. 44(1988)271.Google Scholar
  6. [6]
    M.H. Holzscheiter et al., Nucl. Phys. A 558(1993)709c.Google Scholar
  7. [7]
    D.A. Church and H. Dehmelt, J. Appl. Phys. 40(1969)3127.Google Scholar
  8. [8]
    H. Knudsen and M.H. Holzscheiter, Internal Los Alamos Report No. LA-UR-88-475 (1988).Google Scholar
  9. [9]
    G. Birkl, S. Kassner and H. Walther, Nature 357(1992)310.Google Scholar
  10. [10]
    J. Eades, Hyp. Int. (1996), this volume.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1996

Authors and Affiliations

  • X. Feng
    • 1
  • M. Rathlev
    • 1
  • J. Hangst
    • 1
  • H. Knudsen
    • 1
  • M. H. Holzscheiter
    • 2
  1. 1.Department of Physics and AstronomyUniversity of AarhusÅrhus CDenmark
  2. 2.Physics DivisionLos Alamos National LaboratoryLos AlamosUSA

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