Raman and Thompson regimes of amplification in a wiggler with noncollinear laser and electron beams.
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The collective and single-electron amplification regimes of a noncollinear free-electron laser (FEL) are studied within the framework of dispersion equations. In the limit of small-signal gain the growth rates and the conditions for self-amplified excitations are found for the collective (Raman) and single-electron (Thompson) regimes. The Raman regime is shown to be preferable for the coherent spontaneous second harmonic generation by ultrarelativistic electron beams. Raman excitations in a noncollinear FEL, e.g., in an FEL without inversion, are favored by the noncollinear geometry of the electron and the laser beams, and by the relativity of the beam electrons.
Phys Rev E Stat Nonlin Soft Matter Phys
author list (cited authors)
Klochkov, D. N., Artemiev, A. I., Kurizki, G., Rostovtsev, Y. V., & Scully, M. O.
complete list of authors
Klochkov, DN||Artemiev, AI||Kurizki, G||Rostovtsev, Yu V||Scully, MO