Relativistic electron-fluid model of an applied-B ion diode

A. V. Gordeev, S. V. Levchenko

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A one-dimensional model of an applied-B ion diode filled with magnetized electrons is considered. The screening length rB ≃ B/4πene of the electric field is assumed to be on the order of the collisionless electron skin depth c/ωpe. The electrons are described in cold relativistic hydrodynamics. It is assumed that equalizing the Lagrange invariant l = Ω/ne, where Ω is the electron vorticity and ne is the electron density, leads to an equilibrium state in which l = const. Under this assumption, an additional relation between the magnetic field and electric potential is derived, which allows one to reduce the problem of calculating the ion-diode current to solving a set of algebraic equations for the introduced constants. The results of calculations are compared with the experimental results obtained in the KALIF device (Forschungszentrum Karlsruhe, Germany). The theory proposed predicts a peak of the electron density profile in the vicinity of the anode surface, which is in excellent agreement with recent measurements.

Original languageEnglish
Pages (from-to)193-201
Number of pages9
JournalPlasma Physics Reports
Volume25
Issue number3
Publication statusPublished - Mar 1999
Externally publishedYes

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