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26 April 2024

» arxiv » 1104.4841

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Centrifugal separation and equilibration dynamics in an electron-antiproton plasma
G.B. Andresen ; M.D. Ashkezari ; M. Baquero-Ruiz ; W. Bertsche ; P.D. Bowe ; E. Butler ; C.L. Cesar ; S. Chapman ; M. Charlton ; A. Deller ; S. Eriksson ; J. Fajans ; T. Friesen ; M.C. Fujiwara ; D.R. Gill ; A. Gutierrez ; J.S. Hangst ; W.N. Hardy ; M.E. Hayden ; A.J. Humphries ; R. Hydomako ; S. Jonsell ; N. Madsen ; S. Menary ; P. Nolan ; A. Olin ; A. Povilus ; P. Pusa ; F. Robicheaux ; E. Sarid ; D.M. Silveira ; C. So ; J.W. Storey ; R.I. Thompson ; D.P. van der Werf ; J.S. Wurtele ; Y. Yamazaki ;
Date:	26 Apr 2011
Abstract:	Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally-separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally-separated system. While the observed equilibrium states are expected and in agreement with theory, the equilibration time is approximately constant over a wide range of parameters, a surprising and as yet unexplained result. Electron-antiproton plasmas play a crucial role in antihydrogen trapping experiments.
Source:	arXiv, 1104.4841
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