Conditioning Electron Beams in the Ion-Focused Regime

Fernsler, R. F.; Hubbard, R. F.; Slinker, S. P.

doi:10.21236/ada255635

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2015

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“…The transient nature of this problem is difficult and is usually simplified using a number of plausible assumptions such as that the instantaneous expulsion of plasma electrons, the attainment of partial or total equilibrium by way of a force balance condition, or the neglect of nonlinear terms for simplicity [1]- [3], [7], [22], [25]. The dynamics of the expulsion of plasma electrons are usually examined using particle codes.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Theory Modeling Electron Beam Constriction in a Pulsed Power Discharge

Andersen

Schill

2015

IEEE Trans. Plasma Sci.

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A simple nonlinear theory is developed to examine the process of electron channeling and constriction for an energetic electron beam passing through a cool thermalized plasma discharge. A number of different perturbations characterize and categorize the physical process of the three-fluid system. In this model, the electron species is separated into two different species of the same type but with very different initial particle states. A normalized set of curves parameterize the conditions most probable leading to electron channeling and pinch (beam constriction) in a pulsed power glow discharge. The theory suggests that energetic secondary electron emission at the cathode is responsible for glow discharge constriction in a pulsed power discharge.

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