Inclusion of electron betatron motion on longitudinal Wiggler-undulator radiation

Effect of induced betatron motion on longitudinal wiggler free-electron laser gain

“…The spectral features of the undulator radiation depend on a large number of effects. The present work is an extension of earlier studies on betatron motion~Dattoli et al, 1992motion~Dattoli et al, , 1995Chhotray et al, 1998b! where the role of an auxiliary field is examined for gain enhancement via extra modulations of the electron betatron oscillations. The phenomenology inherent to this problem is very rich as additional harmonics come into play and cause sizeable effects.…”

“…We assume that the electron moves in an undulator field whose on-axis field is specified by~Yadav et al, 1995;Chhotray et al, 1998a, 1998b…”

“…In recent years, there have been several important studies of longitudinal wiggler-undulator radiation~Yadav et al, 1995;Chhotray et al, 1998aChhotray et al, , 1998b In the studies, the spectral properties of the radiation are derived from the Lienard Wiechert potential in the far field limit and various underlying physical mechanisms of the longitudinal wiggler free-electron laser schematic are outlined. The spectral features of the undulator radiation depend on a large number of effects.…”