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Free-electron laser with a rotating quadrupole wiggler

Journal Article · · Phys. Fluids; (United States)
DOI:https://doi.org/10.1063/1.865280· OSTI ID:5669787
A new rotating quadrupole wiggler configuration for free-electron lasers is proposed. The stability analyses of the particle trajectories in a continuously rotating quadrupole magnetic field and self-fields of a solid beam are performed. The resulting orbit equations are solved exactly and it is shown that high-current beams can be confined. To analyze the potential of this wiggler for free-electron lasers, a set of nonlinear orbit equations is derived which averages over the fast time variation in both the wiggler and radiation fields. By integrating these equations, the linearized single particle gain of the free-electron laser is calculated. It is shown that, at comparable wiggler strengths, the rotating quadrupole wiggler and conventional wiggler give similar gains.
Research Organization:
Plasma Theory Branch, Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375
OSTI ID:
5669787
Journal Information:
Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 28:7; ISSN PFLDA
Country of Publication:
United States
Language:
English