Introduction to the Physics of Free Electron Laser and Comparison with Conventional Laser Sources

Details Introduction to the Physics of Free Electron Laser and Comparison with Conventional Laser Sources Introduction to the Physics of Free Electron Laser and Comparison with Conventional Laser Sources

2010-10-08

arxiv.org/abs/1010.1647v1

Physics

Accelerator Physics

Scientific paper

This report is a primer introduction on the sources of coherent syncrotron radiation from FELs compared to conventional lasers. Even though the underlying mechanisms are different, FELs can be considered a laser source to all effects. In fact FEL is based on the stimulated emission of virtual photons by a relativistic electron beam, passing through an undulator/wiggler, much like conventional lasers exploit the stimulated emission by an atomic/molecular system on which a population inversion has been realized. FEL operation is illustrated by means of the usual set of parameters (gain, saturation intensity...) used to describe the functioning of conventional lasers.

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