The effect of reflected beam electrons on the distribution of energy deposited in a target

When a solid target is irradiated by an electron beam generated in a direct-action diode and transported to the target in a magnetic guide field, an important role belongs to electrons returned to the target as a result of multiple reflections from the target and the accelerating field region. The energy spectrum of electrons incident on the target and the deposited energy depth profile the target were studied by the Monte-Carlo method. An algorithm for calculating these characteristics was developed, based upon the method of separating the total electron flux into components with respect to the multiplicity of crossing of the target-vacuum interface.