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Jeffrey S. Hangst

Enhanced Control and Reproducibility of Non-Neutral Plasmas

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  • M. Ahmadi, Univ Liverpool, University of Liverpool, Dept Phys
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  • B. X. R. Alves
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  • C. J. Baker, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • W. Bertsche, Sci Tech Daresbury, STFC Daresbury Laboratory, Cockcroft Inst
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  • A. Capra, TRIUMF
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  • C. Carruth, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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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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  • S. Cohen, Ben Gurion Univ Negev, Ben Gurion University, Blaustein Inst Desert Res, Dept Environm Phys
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  • R. Collister, TRIUMF
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  • S. Eriksson, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • A. Evans, Univ Calgary, University of Calgary, Dept Phys & Astron
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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
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  • T. Friesen
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  • M. C. Fujiwara, TRIUMF
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  • D. R. Gill, TRIUMF
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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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  • M. A. Johnson, Univ Manchester, University of Manchester, Sch Phys & Astron
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  • S. A. Jones
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  • S. Jonsell, Stockholm Univ, Stockholm University, Dept Phys
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  • L. Kurchaninov, TRIUMF
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  • N. Madsen, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • M. Mathers, York Univ, York University - Canada, Dept Phys & Astron
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  • D. Maxwell, Univ Coll Swansea, Swansea University, Coll Sci, Dept Phys
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  • J. T. K. McKenna, TRIUMF
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  • S. Menary, York Univ, York University - Canada, Dept Phys & Astron
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  • T. Momose, Univ British Columbia, Dept Chem
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  • J. J. Munich, Simon Fraser Univ, Simon Fraser University, Dept Phys
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  • K. Olchanski, TRIUMF
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  • A. Olin, Univ Victoria, University of Victoria, Dept Phys & Astron
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  • P. Pusa, Univ Liverpool, University of Liverpool, Dept Phys
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  • C. O. Rasmussen
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  • F. Robicheaux, Purdue Univ, Purdue University, Purdue University System, Dept Phys & Astron
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  • R. L. Sacramento
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  • M. Sameed, Univ Manchester, University of Manchester, Sch Phys & Astron
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  • E. Sarid, Soreq NRC
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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 Calgary, University of Calgary, Dept Phys & Astron
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  • G. Stutter
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  • T. D. Tharp, Marquette Univ, Marquette University, Phys Dept
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  • J. E. Thompson, York Univ, York University - Canada, Dept Phys & Astron
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  • R. I. Thompson, Univ Calgary, University of Calgary, Dept Phys & Astron
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  • D. P. van der Werf, CEA Saclay, IFRU
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  • J. S. Wurtele, Univ Calif Berkeley, University of California Berkeley, University of California System, Dept Phys
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  • ALPHA Collaboration

The simultaneous control of the density and particle number of non-neutral plasmas confined in Penning-Malmberg traps is demonstrated. Control is achieved by setting the plasma's density by applying a rotating electric field while simultaneously fixing its axial potential via evaporative cooling. This novel method is particularly useful for stabilizing positron plasmas, as the procedures used to collect positrons from radioactive sources typically yield plasmas with variable densities and particle numbers; it also simplifies optimization studies that require plasma parameter scans. The reproducibility achieved by applying this technique to the positron and electron plasmas used by the ALPHA antihydrogen experiment at CERN, combined with other developments, contributed to a 10-fold increase in the antiatom trapping rate.

OriginalsprogEngelsk
Artikelnummer025001
TidsskriftPhysical Review Letters
Vol/bind120
Nummer2
Antal sider6
ISSN0031-9007
DOI
StatusUdgivet - 8 jan. 2018

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