Free-Electron Laser

Chapter
Part of the Graduate Texts in Physics book series (GTP)

Abstract

In a free-electron laser (FEL), free electrons of a velocity near the speed of light are passing through a periodic magnetic field. Due to the Lorentz force, the electrons perform oscillations (free-electron oscillations) with displacements transverse to the propagation direction. Stimulated emission of radiation by the oscillating electrons is the origin of free-electron laser radiation. The frequency of the radiation increases quadratically with the electron energy. Frequency tuning over a large frequency range is possible by changing the electron energy; the range of the electron energy is determined by the particle accelerator that produces an external electron beam used to operate a free-electron laser.

Keywords

Transverse Velocity Gain Coefficient Transverse Oscillation Electron Oscillation High Frequency Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institut für Angewandte PhysikUniversität RegensburgRegensburgGermany

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