BEAM CHARACTERISTICS OF SHORT-PULSE RADIATION WITH ELECTROMAGNETIC MISSILE EFFECT

Beam characteristics such as beamwidth and beam intensity of short-pul se radiation with electromagnetic missile effect, not restricted to th e electromagnetic missile, are generally range dependent in pulse prop agation. An effective measure to study such beam characteristics is to investigate the local drop rate of the energy pattern in the beam pro file 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 definite ly determined by the time-space source parameters so that the beam cha racteristics can be readily evaluated and properly controlled. Moreove r, the underlying relation between the slow decay rate and the energy drop rate are constructed, which shows perfect harmony in achieving sl ower-energy decay and higher-energy concentration in the beam. (C) 199 8 American Institute of Physics.