Proceedings PaperLasers, Microwave Tubes, And Accelerators: A Unified Point Of View
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Many practical devices of technical interest rely for their operation on the coherent interaction between harmonic electromagnetic fields and ensembles of charged particles, constrained to move in orbits or trajectories by electric or magnetic fields. These have in many cases been studied by different communities of physicists and engineers, and different points of view have emerged. At one extreme, a purely quantum mechanical optical approach is appropriate, at the other, classical engineering concepts developed originally for lumped circuits may be more suitable. Some relatively recent developments, such as the gyrotron and free electron laser have features in common with lasers, microwave tubes, and particle accelerators. Some of these devices will be examined in an informal way from several different view points, with emphasis on a physical rather than mathematical description. Similarities and essential differences will be noted.