Abstract
A three-dimensional, space-frequency model for the excitation of electromagnetic radiation in a free-electron laser is presented. The approach is applied in a numerical particle code WB3D simulating the interaction of a free-electron laser operating in the linear and non-linear regimes. Solution of the electromagnetic excitation equations in the frequency domain inherently takes into account dispersive effects arising from the cavity and the gain medium. Moreover, it facilitates the consideration of statistical features of the electron beam and the excited radiation necessary for the study of spontaneous emission, synchrotron amplified spontaneous emission (SASE), super-radiance and noise. We employ the code to study the statistical and spectral characteristics of the radiation generated in a pulsed beam free-electron laser operating in the millimeter wavelengths. The evolution of the radiation spectrum, excited when a Gaussian-shaped bunch with a random distribution of electrons is passing through the wiggler, was investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 510-515 |
| Number of pages | 6 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 483 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 1 May 2002 |
Keywords
- Free electron laser
- SASE
- Space-frequency 3D model
- Spontaneous and super-radiant emission
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