G. Dattoli et al., Energy phase correlation effects on FEL dynamics and coherent harmonic generation: a critical review, NUCL INST A, 432(2-3), 1999, pp. 501-504
We analyze the problems associated with the generation of coherent undulato
r radiation by an e-beam having a longitudinally correlated phase space. Th
e problem is treated by exploiting a suitable extension of the Courant-Snyd
er formalism to longitudinal dynamics. The role played by the bunching is c
larified and a matching condition for the longitudinal phase space is found
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