Physical Review Special Topics - Accelerators and Beams
We analyze the interaction between a charge and its electromagnetic field in the case of the charge moving in a waveguide and intersecting a boundary between two nondispersive media. The total work done by the field on the charge is calculated both analytically and numerically. It is shown that the work is positive under certain conditions, that is the force actuating the charge is accelerating. A physical interpretation of this phenomenon from the point of view of energy conservation is given. The kinetic energy gain per unit length and for all time of motion is analyzed as well.
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