Centrifugal separation and equilibration dynamics in an electron-antiproton plasma
Plasma Physics
2011-04-27 v1 High Energy Physics - Experiment
Atomic Physics
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.
Keywords
Cite
@article{arxiv.1104.4841,
title = {Centrifugal separation and equilibration dynamics in an electron-antiproton plasma},
author = {G. B. Andresen and M. D. Ashkezari and M. Baquero-Ruiz and W. Bertsche and P. D. Bowe and E. Butler and C. L. Cesar and S. Chapman and M. Charlton and A. Deller and S. Eriksson and J. Fajans and T. Friesen and M. C. Fujiwara and D. R. Gill and A. Gutierrez and J. S. Hangst and W. N. Hardy and M. E. Hayden and A. J. Humphries and R. Hydomako and S. Jonsell and N. Madsen and S. Menary and P. Nolan and A. Olin and A. Povilus and P. Pusa and F. Robicheaux and E. Sarid and D. M. Silveira and C. So and J. W. Storey and R. I. Thompson and D. P. van der Werf and J. S. Wurtele and Y. Yamazaki},
journal= {arXiv preprint arXiv:1104.4841},
year = {2011}
}