Abstract

Beam characteristics such as beamwidth and beam intensity of short-pulse radiation with electromagnetic missile effect, not restricted to the electromagnetic missile, are generally range dependent in pulse propagation. An effective measure to study such beam characteristics is to investigate the local drop rate of the energy pattern in the beam profile and the local decay rate of energy in the pulse beam. It is shown that both the energy decay rate and the energy drop rate are definitely determined by the time–space source parameters so that the beam characteristics can be readily evaluated and properly controlled. Moreover, the underlying relation between the slow decay rate and the energy drop rate are constructed, which shows perfect harmony in achieving slower-energy decay and higher-energy concentration in the beam.

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