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

Conference · Fri Oct 31 04:00:00 EST 2003

OSTI ID:820270

Roy, P K ^[1]; 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

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1. LBNL Library

We have demonstrated experimental techniques to provide active neutralization for space-charge dominated beams as well as to prevent uncontrolled ion beam neutralization by stray electrons. 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. We present measurements of current transmission, beam spot size as a function of axial position, beam energy and plasma source conditions. Detailed comparisons with theory are also presented.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Fusion Energy Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 820270
• Report Number(s): LBNL--53974; HIFAN 1281
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CATHODES
DRIFT TUBES
ELECTRONS
FOCUSING
ION BEAMS
LINERS
PLASMA
SPACE CHARGE