A radio-frequency (rf) modulated electron beam passing through a magnetic undulator emits coherent radiation at harmonics of the rf with a phase which depends on the electron drift velocity. Treating the bunches as ensembles of electrons, each with its energy and phase, the radiated field is calculated as a sum over the particle distribution in the phase space. At long wavelengths a proper correlation between the energy and phase distributions of the electrons in the bunch can be exploited to lock the radiated field in phase, resulting in a significant enhancement of the coherent emission. © 1998 The American Physical Society.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Doria, A., Gallerano, G. P., Giovenale, E., Letardi, S., Messina, G., & Ronsivalle, C. (1998). Enhancement of coherent emission by energy-phase correlation in a bunched electron beam. Physical Review Letters, 80(13), 2841 - 2844. https://doi.org/10.1103/PhysRevLett.80.2841