Abstract
The transport of a relativistic electron beam was studied experimentally and numerically in a magnetic field configuration which consists of a focusing wiggler as well as an additional axial guide field. A new beam divergence was found for the lower side of the magnetoresonance. It was identified as due to the effect of the second harmonic mode of the cyclotron frequency in the resonance, determined by nΩ ‖=k w ν ‖ for n = 2 . The experimental observation shows good agreement with the numerical calculation, where the motions of the electrons are traced in a planar wiggler having parabolic pole faces and an axial uniform guide field, in the limit of low density beam. The formalism for the calculation is given and discussed. The harmonic resonance was detected for the planar wiggler first, and it could appear also for the helical one.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call