Abstract

A traveling-wave technique of computing the radiation from accelerated electrons is described. In contrast to the usual method which expands the field due to the moving electrons in spherical waves, an expansion in traveling waves along a preferred direction is utilized. This method is especially suitable in those cases where the radiation is confined by cylindrical conducting boundaries or plasmas. The technique is illustrated by considering the problem of the radiation from an electron in circular motion both in free space and within a coaxial conducting cylinder, and from an electron in a variable-pitch helical orbit.

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