Phys. Rev. Lett. 61, 2933–2936 (1988)

Emittance Growth and Image Formation in a Nonuniform Space-Charge-Dominated Electron Beam

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M. Reiser^*,†, C. R. Chang^*, D. Kehne^*, K. Low^†, and T. Shea^†
Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742

H. Rudd
Berkeley Research Associates, Springfield, Virginia 22150

I. Haber
Naval Research Laboratory, Washington, D.C. 20375

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Received 23 June 1988; published in the issue dated 26 December 1988

An experiment was designed to check theoretical predictions of charge homogenization and emittance growth in nonuniform space-charge-dominated beams due to conversion of field energy into transverse kinetic energy. Five beamlets were masked out of a solid 5-keV electron beam and injected into a periodic solenoidal focusing channel. Phosphor screen images showed that the beamlets merged into an almost uniform density single beam. Images of the five-beamlet configuration were observed at a distance of 7-8 lens periods. Experimental results on merging distance and emittance growth were compared with theory and simulation and good agreement was found.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.61.2933

DOI:

10.1103/PhysRevLett.61.2933

PACS:

52.40.Mj, 29.15.-n, 52.25.Wz

^*Electrical Engineering Department.

^†Department of Physics and Astronomy.

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Phys. Rev. Lett. 61, 2933–2936 (1988)

Emittance Growth and Image Formation in a Nonuniform Space-Charge-Dominated Electron Beam

See Also