Explosive emission cathodes are generally used to produce high-power electron beams1, 2. Therefore, considerable study is being given to the expanding cathode plasma, its characteristics, and the velocity of motion of the plasma front at the initial stage of explosive emission, when we deal with essentially nonideal high-density plasma. One of the most important problems in constructing a model of the transition of field emission to explosive electron emission is a self-consistent description of the processes at the plasma front of the expanding cathode flare.
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