A multi-frequency approach to free electron lasers driven by short electron bunches

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54401· OSTI ID:21175526

Piovella, Nicola ^[1]

---

1. Dipartimento di Fisica dell'Universita di Milano via Celoria 16, 20133 Milano (Italy)

A multi-frequency model for free electron lasers (FELs), based on the Fourier decomposition of the radiation field coupled with the beam electrons, is discussed. We show that the multi-frequency approach allows for an accurate description of the evolution of the radiation spectrum, also when the FEL is driven by short electron bunches, of arbitrary longitudinal profile. We derive from the multi-frequency model, by averaging over one radiation period, the usual FEL equations modelling the slippage between radiation and particles and describing the super-radiant regime in high-gain FELs. As an example of application of the multi-frequency model, we discuss the coherent spontaneous emission (CSE) from short electron bunches.

• OSTI ID: 21175526
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 413; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BUNCHING
COHERENT RADIATION
COMPUTERIZED SIMULATION
ELECTRON BEAMS
FREE ELECTRON LASERS
GAIN
LINEAR ACCELERATORS
SUPERRADIANCE