Laser-controlled antihydrogen production by two-stage charge exchange

C. H. Storry*, N. Guise, B. Levitt, D. Le Sage, A. Speck, G. Gabrielse, D. Grzonka, W. Oelert, G. Schepers, T. Sefzick, H. Pittner, M. Herrmann, J. Walz, T. W. Hänsch, D. Comeau, M. George, E. A. Hessels

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Our ATRAP collaboration has now demonstrated a second technique for antihydrogen (H̄) production. Lasers are used for the first time to control the production of H̄ atoms in our cryogenic apparatus at CERN. As suggested in ref. [2] and first reported in ref. [1], lasers excite a thermal beam of cesium (Cs) atoms to a Rydberg state. In a first charge exchange collision one of these laser-excited Cs atoms (Cs*) and a cold e + produces positronium (Ps). Our measurements at Harvard([3]) and at CERN([1]) confirm CTMC simulations([2]) that the laser-selected binding energy in the Cs atom is preserved by the collision and results in Ps with the selected binding energy. A second charge exchange is between one of these Ps atoms and a trapped p̄. H̄ is produced by this second collision and is expected to again have the same binding energy. One advantage of this technique as discussed in ref. [2] is that the H̄ produced is expected to be extremely cold, at the temperature of the trapped p̄, allowing for possible confinement of the H̄ atoms in a magnetic trap.

Original languageEnglish (US)
Title of host publicationLOW ENERGY ANTIPROTON PHYSICS
Subtitle of host publicationEighth International Conference on Low Energy Antiproton Physics, LEAP'05
Pages291-295
Number of pages5
DOIs
StatePublished - Oct 26 2005
EventLOW ENERGY ANTIPROTON PHYSICS: 8th International Conference on Low Energy Antiproton Physics, LEAP'05 - Bonn, Germany
Duration: May 16 2005May 22 2005

Publication series

NameAIP Conference Proceedings
Volume796
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW ENERGY ANTIPROTON PHYSICS: 8th International Conference on Low Energy Antiproton Physics, LEAP'05
CountryGermany
CityBonn
Period5/16/055/22/05

Keywords

  • Antihydrogen

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Storry, C. H., Guise, N., Levitt, B., Le Sage, D., Speck, A., Gabrielse, G., Grzonka, D., Oelert, W., Schepers, G., Sefzick, T., Pittner, H., Herrmann, M., Walz, J., Hänsch, T. W., Comeau, D., George, M., & Hessels, E. A. (2005). Laser-controlled antihydrogen production by two-stage charge exchange. In LOW ENERGY ANTIPROTON PHYSICS: Eighth International Conference on Low Energy Antiproton Physics, LEAP'05 (pp. 291-295). (AIP Conference Proceedings; Vol. 796). https://doi.org/10.1063/1.2130182