E. Fiorentino

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.

Status of the ENEA-Dartmouth far infrared Cherenkov laser experiment

Abstract In this article we report on the design parameters and status of the experiment of the ENEA-Dartmouth Cherenkov free electron laser. A brief analysis of the spontaneous emission process is also presented.

A 100 μm Cherenkov laser experiment

Abstract The basic operating principles of far infrared Cherenkov lasers are summarized and then used as a design guide for a proposed 100 μm region oscillator experiment. A discussion of the required accelerator and resonator parameters is presented and the preliminary experimental progress is reviewed.

Status of the free electron laser experiment at the ENEA Frascati center

Abstract The status of the free electron laser experiment under realization at the ENEA Frascati center is described. The experimental results relevant to electron beam and spontaneous radiation are reported.

Design considerations for the ENEA-FEL optical resonator

Abstract The main problems connected with the design of the optical resonator for a free electron laser are briefly analyzed with respect to the optimization of the laser performance. The proper operation of the ENEA free electron laser indeed requires accurate setting and control of both mirror spacing and angular alignment. A long-path Fabry-Perot interferometer with a sensitivity of ∼ 10−6 rad developed for the control of the resonator alignment is described.

Infrared FEL microtron operation at the ENEA center of Frascati

Abstract The FEL experimental activity at the ENEA Frascati center is aimed at producing a free electron laser operating in the region λ = 10−30 μ m with an average power of 50 to 100 W, using a microtron as the electron beam source. In this paper we analyze the main experimental features relevant to the realization of the programme.

Gain as an optical diagnostic in the ENEA free-electron laser

A brief summary is given of the collaborative project between ENEA and Heriot-Watt University on the Italian ENEA free-electron laser (FEL). The importance of optical diagnostics is discussed, and an outline of the physical process of gain in a FEL is given, with special reference to phase sensitive coherent gain measurement.

The variable gap permanent magnet linear undulator for the ENEA-FEL experiment

Abstract The main results of the measurement of a set of SmCo permanent magnets utilized for the realization of a linear undulator for the ENEA-FEL experiment are summarized.

The microtron FEL Čerenkov: theoretical and experimental aspects

In this note we review the essential features of the Cerenkov Free Electron Laser (CFEL) from both the theoretical and experimental point of view. In particular we discuss the CFEL microtron joint ENEA Frascati‐Dartmouth experiment.