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Jeffrey S. Hangst

Experimental and computational study of the injection of antiprotons into a positron plasma for antihydrogen production

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  • C. Amole, York University
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  • M.D. Ashkezari, Simon Fraser University
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  • M. Baquero-Ruiz, University of California
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  • W. Bertsche, Swansea University
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  • E. Butler, CERN
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  • A. Capra, York University
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  • C.L. Cesar, Universidade Federal do Rio de Janeiro
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  • M. Charlton, Swansea University
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  • A. Deller, Swansea University
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  • S. Eriksson, Swansea University
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  • J. Fajans, University of California
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  • T. Friesen, University of Calgary
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  • M. Fujiwara, University of Calgary
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  • D.R. Gill, 4004 Wesbrook Mall
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  • A. Gutierrez, Lawrence Berkely National Laboratory
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  • J.S. Hangst
  • W.N. Hardy, University of British Columbia
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  • M.E. Hayden, Simon Fraser University
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  • C.A. Isaac, Swansea University
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  • S. Jonsell, Stockholm University
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  • L. Kurchaninov, 4004 Wesbrook Mall
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  • A. Little, University of California
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  • N. Madsen, Swansea University
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  • J.T.K. McKenna, University of Liverpool
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  • S. Menary, York University
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  • S.C. Napoli, Swansea University
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  • K. Olchanski, 4004 Wesbrook Mall
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  • A. Olin, 4004 Wesbrook Mall
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  • P. Pusa, University of Liverpool
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  • Chris Ørum Rasmussen, Danmark
  • F. Robicheaux, Auburn University
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  • E. Sarid, Nuclear Research Center-Negev
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  • C.R. Shields, Swansea University
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  • D.M. Silveira, Universidade Federal do Rio de Janeiro
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  • C. So, University of California
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  • S. Stracka, 4004 Wesbrook Mall
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  • R.I. Thompson, University of Calgary
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  • D.P. Van Der Werf, Swansea University
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  • J.S. Wurtele, University of California
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  • A. Zhmoginov, University of California
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  • L. Friedland, Hebrew University
One of the goals of synthesizing and trapping antihydrogen is to study the validity of charge-parity-time symmetry through precision spectroscopy on the anti-atoms, but the trapping yield achieved in recent experiments must be significantly improved before this can be realized. Antihydrogen atoms are commonly produced by mixing antiprotons and positrons stored in a nested Penning-Malmberg trap, which was achieved in ALPHA by an autoresonant excitation of the antiprotons, injecting them into the positron plasma. In this work, a hybrid numerical model is developed to simulate antiproton and positron dynamics during the mixing process. The simulation is benchmarked against other numerical and analytic models, as well as experimental measurements. The autoresonant injection scheme and an alternative scheme are compared numerically over a range of plasma parameters which can be reached in current and upcoming antihydrogen experiments, and the latter scheme is seen to offer significant improvement in trapping yield as the number of available antiprotons increases.
OriginalsprogEngelsk
Artikelnummer043510
TidsskriftPhysics of Plasmas
Vol/bind20
Nummer4
ISSN1070-664X
DOI
StatusUdgivet - 1 apr. 2013

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