Grand initial value problem of high gain free electron lasers

High-Gain Free Electron Lasers Using Induction Linear Accelerators

High-power free electron lasers (FEL’s) can be realized using induction linear accelerators as the source of the electron beam. These accelerators are currently capable of producing intense cwrents (102-104 A) at moderately high energy (1-50 MeV). Experiments using a 500 A, 3.3 MeV beam have produced 80 MW of radiation at 34.6 GHz and are in good agreement with theoretical analysis. Future expe...

Quantum effects in high-gain free-electron lasers.

A many-particle fully quantized theory for a free-electron laser which is valid in the high-gain regime is presented. We examine quantum corrections for the high-gain single-pass free-electron laser. It is shown that quantum effects become significant when the photon energy becomes comparable to the gain bandwidth. The initiation of the free-electron laser process from quantum fluctuations in t...

On the Importance of Electron Beam Brightness in High Gain Free Electron Lasers

Linear accelerators delivering high brightness electron beams are essential for driving short wavelength, high gain free-electron lasers (FELs). The FEL radiation output efficiency is often parametrized through the power gain length that relates FEL performance to electron beam quality at the undulator. In this review article we illustrate some approaches to the preliminary design of FEL linac-...

Optical gain, phase shift, and profile in free-electron lasers.

Longitudinal dispersion of orbital angular momentum modes in high-gain free-electron lasers

Erik Hemsing, Agostino Marinelli, Sven Reiche, and James Rosenzweig Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA Universita degli Studi di Roma ‘‘La Sapienza’’, Via Antonia Scarpa 14, Rome, 00161, Italy INFN-LNF, via E. Fermi, 40-00044 Frascati, Rome, Italy (Received 30 May 2008; published 30 July...