An annular high-current electron beam with an energy spread in a coaxial magnetically insulated diode View Full Text


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Article Info

DATE

2013-11-15

AUTHORS

A. A. Grishkov, I. V. Pegel

ABSTRACT

An elementary theory of an annular high-current electron beam in a uniform transport channel and a coaxial magnetically insulated diode is generalized to the case of counterpropagating electron beams with a spread over kinetic energies. Expressions for the sum of the absolute values of the forward and backward currents in a uniform transport channel and for the flux of the longitudinal component of the generalized momentum in a coaxial magnetically insulated diode as functions of the maximum electron kinetic energy are derived for different values of the relative width of the energy distribution function. It is shown that, in a diode with an expanding transport channel and a virtual cathode limiting the extracted current, counterpropagating particle flows are established between the cathode and the virtual cathode within a certain time interval after the beginning of electron emission. The accumulation of electrons in these flows is accompanied by an increase in their spread over kinetic energies and the simultaneous decrease in the maximum kinetic energy. The developed model agrees with the results of particle-in-cell simulations performed using the KARAT and OOPIC-Pro codes. More... »

PAGES

936-946

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063780x13110056

DOI

http://dx.doi.org/10.1134/s1063780x13110056

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1024679037


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