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Jeffrey S. Hangst

Search for trapped antihydrogen in ALPHA

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • N. Madsen, Danmark
  • W. Bertsche, Swansea University
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  • E. Butler, Swansea University
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  • M. Charlton, Swansea University
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  • A.J. Humphries, Swansea University
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  • S. Jonsell, Swansea University
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  • L.V. Jørgensen
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  • D.P. Van Der Werf, Swansea University
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  • G.B. Andresen
  • P.D. Bowe, Danmark
  • J.S. Hangst
  • M.D. Ashkezari, Simon Fraser University
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  • M.E. Hayden, Simon Fraser University
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  • M. Baquero-Ruiz, University of California at Berkeley
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  • C. Bray, University of California at Berkeley
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  • S. Chapman, University of California at Berkeley
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  • J. Fajans, University of California at Berkeley
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  • A. Povilus, University of California at Berkeley
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  • C. So, University of California at Berkeley
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  • J.S. Wurtele, University of California at Berkeley
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  • C.L. Cesar, Universidade Federal do Rio de Janeiro
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  • R. Lambo, Universidade Federal do Rio de Janeiro
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  • T. Friesen, University of Calgary
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  • R. Hydomako, University of Calgary
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  • R.I. Thompson, University of Calgary
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  • M. Fujiwara
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  • D.R. Gill, 4004 Wesbrook Mall
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  • L. Kurchaninov, 4004 Wesbrook Mall
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  • K. Olchanski, 4004 Wesbrook Mall
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  • A. Olin
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  • J.W. Storey, 4004 Wesbrook Mall
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  • W.N. Hardy, University of British Columbia
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  • S. El Nasr, University of British Columbia
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  • S. Menary, York University
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  • P. Nolan, University of Liverpool
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  • P. Pusa, University of Liverpool
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  • F. Robicheaux, Auburn University
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  • E. Sarid, NRCN-Nuclear Research Center Negev
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  • D.M. Silveira, RIKEN
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  • Y. Yamazaki, RIKEN
Antihydrogen spectroscopy promises precise tests of the symmetry of matter and antimatter, and can possibly offer new insights into the baryon asymmetry of the universe. Antihydrogen is, however, difficult to synthesize and is produced only in small quantities. The ALPHA collaboration is therefore pursuing a path towards trapping cold antihydrogen to permit the use of precision atomic physics tools to carry out comparisons of antihydrogen and hydrogen. ALPHA has addressed these challenges. Control of the plasma sizes has helped to lower the influence of the multipole field used in the neutral atom trap, and thus lowered the temperature of the created atoms. Finally, the first systematic attempt to identify trapped antihydrogen in our system is discussed. This discussion includes special techniques for fast release of the trapped anti-atoms, as well as a silicon vertex detector to identify antiproton annihilations. The silicon detector reduces the background of annihilations, including background from antiprotons that can be mirror trapped in the fields of the neutral atom trap. A description of how to differentiate between these events and those resulting from trapped antihydrogen atoms is also included.
OriginalsprogEngelsk
TidsskriftCanadian Journal of Physics
Vol/bind89
Nummer1
Sider (fra-til)7-16
Antal sider10
ISSN0008-4204
DOI
StatusUdgivet - 1 jan. 2011

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