NDLI: Nonlinear charge and current neutralization for an ion beam pulse propagating through a background plasma

Content Provider	IEEE Xplore Digital Library
Author	Kaganovich, I.D. Shvets, G. Startsev, E. Davidson, R.C.
Copyright Year	2001
Description	Author affiliation: Plasma Phys. Lab., Princeton Univ., NJ, USA (Kaganovich, I.D.)
Abstract	This paper demonstrates the possibility of quasi-steady-state transport of a finite-length ion beam through a chamber filled with plasma of arbitrary density. We conclude that, in principle, partially-current-neutralized equilibria exist in the reference frame moving with the ion charge bunch for arbitrary ratio of beam density to plasma density. The electric and magnetic fields generated by the ion beam are studied analytically for the nonlinear case where the plasma density is comparable in size with the beam density. Particle-in-cell simulations of current and charge neutralization agree well with analytical results. An important conclusion is that for long, nonrelativistic ion beams, with length much longer than the beam radius and the plasma neutralization length, which is the ratio of the beam velocity to the electron plasma frequency, the charge neutralization is, for all practical purposes, complete even for very tenuous background plasmas. Current neutralization is usually much weaker than charge neutralization. As a result, the magnetic pinching force dominates the electric defocusing force, and the beam ions are always pinched during quasi-steady-state beam propagation through the background plasma.
Sponsorship	U.S. Dept. Energy
Starting Page	2072
Ending Page	2074
File Size	291690
Page Count	3
File Format	PDF
ISBN	0780371917
DOI	10.1109/PAC.2001.987280
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ion beams Particle beams Plasma density Magnetic analysis Plasma simulation Plasma transport processes Magnetic fields Analytical models Electron beams Frequency
Content Type	Text
Resource Type	Article

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