Results on intense beam focusing and neutralization from the neutralized beam experiment

Experimental techniques to provide active neutralization for space-charge-dominated beams as well as to prevent uncontrolled ion beam neutralization by stray electrons have been demonstrated. Neutralization is provided by a localized plasma injected from a cathode arc source. Unwanted secondary elec...

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Bibliographic Details
Published in:Physics of Plasmas 2004-05, Vol.11 (5), p.2890-2898
Main Authors: Roy, P. K., Yu, S. S., Eylon, S., Henestroza, E., Anders, A., Bieniosek, F. M., Greenway, W. G., Logan, B. G., Waldron, W. L., Vanecek, D. L., Welch, D. R., Rose, D. V., Davidson, R. C., Efthimion, P. C., Gilson, E. P., Sefkow, A. B., Sharp, W. M.
Format: Article
Language:English
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Summary:Experimental techniques to provide active neutralization for space-charge-dominated beams as well as to prevent uncontrolled ion beam neutralization by stray electrons have been demonstrated. Neutralization is provided by a localized plasma injected from a cathode arc source. Unwanted secondary electrons produced at the wall by halo particle impact are suppressed using a radial mesh liner that is positively biased inside a beam drift tube. Measurements of current transmission, beam spot size as a function of axial position, beam energy, and plasma source conditions are presented along with detailed comparisons with theory.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.1652712