Abstract

A method for finding the distribution function of photoelectrons in a planar pulsed x-ray flux, propagating in a medium, is formulated in an approximation where the medium is collisionless for photoelectrons. Magnetic-field effects lead to amplitude modulation of the components of the electric field arising as a result of the electron current flow behind the x-ray front. It is shown that magnetic-field effects can lead to various instabilities in the ionization formations produced by an instantaneous x-ray pulse. 15 references.

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