Abstract
Several authors have considered the possibility of using stimulated Compton scattering as a source of tunable coherent far infrared radiation. For a finite photon-electron interaction region, it is known that the gain is small. It is shown that there is a significant increase in the photon-electron scattering cross section and hence in the gain when the scattering is performed resonantly in a longitudinal dc magnetic field. It is found that under these conditions appreciable gain is available for pulsed operation.

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