A. Renieri

Progress in the Hamiltonian picture of the free-electron laser

The Hamiltonian picture of the free-electron laser (FEL) is reexamined and the multielectron effects are accounted for. The conditions under which the multieleetron effect can be neglected are made precise (low-gain regime) and, in this connection, the strong signal analysis of the Stanford experiment is carried out.

Kinematic and dynamic properties of a waveguide FEL

Abstract The kinematic and dynamic properties of a waveguide FEL are described in the small signal small gain approximation in both the homogeneous and inhomogeneous regimes.

Lawson-Penner limit and single passage free electron lasers performances

The limits of the performances of a single passage FEL device imposed by the Lawson-Penner law are discussed within the framework of the super mode theory.

The SPARC project: a high-brightness electron beam source at LNF to drive a SASE-FEL experiment

Abstract The Project Sorgente Pulsata e Amplificata di Radiazione Coerente (SPARC), proposed by a collaboration among ENEA–INFN–CNR–Universita’ di Tor Vergata–INFM–ST, was recently approved by the Italian Government and will be built at LNF. The aim of the project is to promote an R&D activity oriented to the development of a coherent ultra-brilliant X-ray source in Italy. This collaboration has identified a program founded on two main issues: the generation of ultra-high peak brightness electron beams and of resonant higher harmonics in the SASE-FEL process, as presented in this paper.

A multimode small signal analysis of the single pass free electron laser

Abstract We analyze the small signal multimode aspects of the single pass free electron laser and study the operating conditions and the relevant laser parameters.

Compact free electron lasers: From Cerenkov to waveguide free electron lasers

Abstract The basic principles of free electron generators of coherent radiation and the practical considerations related to the development of far infrared and sub-millimeter wave sources are discussed in this paper. The attention is focused on compact devices, which reduce the size and cost issue. A review of the main results obtained at the Frascati FEL Facility is presented together with the planned experiments.

About the mathematical aspects of the FEL and their relationship to quantum optics

Abstract In this work we discuss some mathematical problems arising in the analysis of the Free Electron Laser. We point out that the interest in these problems goes beyond the FEL, since they are formally similar to those encountered in the analysis of other topics in quantum optics. We propose general techniques of analysis which can be usefully exploited to understand the FEL physics as well as the other problems where similar mathematical difficulties appear.

A model for the saturation of a storage ring free electron laser

Abstract The dynamical properties of a storage ring free electron laser oscillator are reproduced using a model combining three different saturation mechanisms: laser induced energy spread of the e-beam, associated bunch lengthening and longitudinal synchronism between laser and electron pulses. The stationary output power is shown to be always linked to the power emitted via synchrotron radiation in one machine turn by the circulating e-beam.

Above threshold operation of the ENEA free electron laser

Abstract Recent experimental results of the ENEA FEL experiment performed with a 20 MeV, 120 mA microtron and a linearly polarized pulsed electromagnetic undulator are reported.

Free Electron Laser Amplifier Operation in Storage Ring

The steady state features of the free electron laser amplifier operating in a storage ring is presented. The electron distribution relative to the longitudinal motion and the amplifier output are evaluated as functions of the storage ring parameters and the laser power density. It is shown that the energy transferred from the electrons to the laser beam is proportional to the energy emitted via synchrotron radiation in the whole machine.