The spatial photon intensity distribution is calculated for geometries pertinent to tapered-wiggler free-electron lasers. A large-radius incident photon field interacts with a small-radius e-beam gain medium, and the diffraction of extracted energy from the gain medium to larger radii is analyzed in the limit of small gain. The results are compared with a simple fill-factor approximation.
No takes yet. Share an insight, caveat, or question.
Slater et al. (1981) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: