Radiated Energy Calculation in FELWI

Abstract

The equations of particle motion in the FELWI are derived using Hamiltonian formalism. In small signal regime the uncoupled one dimensional phase equation is derived in the form of pendulum equation. For the practical estimations the same equation along with the equation of particle energy change are solved using perturbation theory and the expressions for gain in FEL regime and particle angle dependence of energy at the exit of first undulator are obtained. Results for gain, particle phase and energy change depending on device and beam parameters are presented.

arXiv admin note: text overlap with arXiv:1611.09246 by other authors

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