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Jeffrey S. Hangst

Antiproton cloud compression in the ALPHA apparatus at CERN

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

DOI

  • A. Gutierrez, Univ British Columbia, University of British Columbia, Dept Phys & Astron
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  • M. D. Ashkezari, Simon Fraser Univ, Simon Fraser University, Dept Phys
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  • M. Baquero-Ruiz, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
  • ,
  • W. Bertsche, Cockcroft Inst, STFC Daresbury Laboratory
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  • C. Burrows, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • E. Butler, CERN, European Organization for Nuclear Research (CERN), University of Geneva, Dept Phys
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  • A. Capra, York Univ, York University - Canada, Dept Phys & Astron
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  • C. L. Cesar, Univ Fed Rio de Janeiro, Universidade Federal do Rio de Janeiro, Universidade do Estado do Rio de Janeiro, Inst Fis
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  • M. Charlton, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • R. Dunlop, Simon Fraser Univ, Simon Fraser University, Dept Phys
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  • S. Eriksson, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • N. Evetts, Univ British Columbia, University of British Columbia, Dept Phys & Astron
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  • J. Fajans, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
  • ,
  • T. Friesen
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  • M. C. Fujiwara, TRIUMF, University of British Columbia
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  • D. R. Gill, TRIUMF, University of British Columbia
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  • J. S. Hangst
  • W. N. Hardy, Univ British Columbia, University of British Columbia, Dept Phys & Astron
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  • M. E. Hayden, Simon Fraser Univ, Simon Fraser University, Dept Phys
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  • C. A. Isaac, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • S. Jonsell, Stockholm Univ, Stockholm University, Dept Phys
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  • L. Kurchaninov, TRIUMF, University of British Columbia
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  • A. Little, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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  • N. Madsen, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • J. T. K. McKenna, TRIUMF, University of British Columbia
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  • S. Menary, York Univ, York University - Canada, Dept Phys & Astron
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  • S. C. Napoli, Stockholm Univ, Stockholm University, Dept Phys
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  • P. Nolan, Univ Liverpool, University of Liverpool, Dept Phys
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  • K. Olchanski, TRIUMF, University of British Columbia
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  • A. Olin, TRIUMF, University of British Columbia
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  • P. Pusa, Univ Liverpool, University of Liverpool, Dept Phys
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  • Chris Ørum Rasmussen
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  • F. Robicheaux, Purdue Univ, Purdue University, Purdue University System, Dept Phys
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  • R. L. Sacramento, Univ Fed Rio de Janeiro, Universidade Federal do Rio de Janeiro, Universidade do Estado do Rio de Janeiro, Inst Fis
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  • E. Sarid, NRCN Nucl Res Ctr Negev, Dept Phys
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  • D. M. Silveira, Univ Fed Rio de Janeiro, Universidade Federal do Rio de Janeiro, Universidade do Estado do Rio de Janeiro, Inst Fis
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  • C. So, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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  • S. Stracka, TRIUMF, University of British Columbia
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  • J. Tarlton, Univ London Imperial Coll Sci Technol & Med, Imperial College London, Ctr Cold Matter
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  • T. D. Tharp
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  • R. I. Thompson, Univ Calgary, University of Calgary, Dept Phys & Astron
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  • P. Tooley, Univ Manchester, University of Manchester, Sch Phys & Astron
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  • M. Turner, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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  • D. P. van der Werf, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • J. S. Wurtele, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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  • A. I. Zhmoginov, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys

We have observed a new mechanism for compression of a non-neutral plasma, where antiprotons embedded in an electron plasma are compressed by a rotating wall drive at a frequency close to the sum of the axial bounce and rotation frequencies. The radius of the antiproton cloud is reduced by up to a factor of 20 and the smallest radius measured is similar to 0.2 mm. When the rotating wall drive is applied to either a pure electron or pure antiproton plasma, no compression is observed in the frequency range of interest. The frequency range over which compression is evident is compared to the sum of the antiproton bounce frequency and the system's rotation frequency. It is suggested that bounce resonant transport is a likely explanation for the compression of antiproton clouds in this regime.

OriginalsprogEngelsk
TidsskriftHyperfine Interactions
Vol/bind235
Nummer1-3
Sider (fra-til)21-28
Antal sider8
ISSN0304-3843
DOI
StatusUdgivet - nov. 2015
Begivenhed6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP) - Takamatsu, Japan
Varighed: 1 dec. 20145 dec. 2014

Konference

Konference6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP)
LandJapan
ByTakamatsu
Periode01/12/201405/12/2014

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