Self-fields in free-electron lasers with planar wiggler and ion-channel guiding.

Autor: B Farokhi, F B Jafary, B Maraghechi
Předmět:
Zdroj: Journal of Physics D: Applied Physics; Sep2006, Vol. 39 Issue 17, p3742-3748, 7p
Abstrakt: A theory of self-electric and self-magnetic fields of a relativistic electron beam passing through a one-dimensional planar wiggler and an ion-channel is presented. The equilibrium orbits and their stability, under the influence of self-electric and self-magnetic fields, are analysed. New unstable orbits, in the first part of the group I orbits, are found. It is shown that for a low energy and high density beam the self-fields can produce very large effects. Stabilities of quasi-steady-state orbits are investigated by analytical and numerical methods and perfect agreement was found. The theory of small signal gain is used to derive a formula for the gain with the self-field effects included. A numerical analysis is conducted to study the self-field effects on the quasi-steady-state orbits and the gain. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index