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Observation of coherent mm wave radiation from microtron driven Cherenkov FEL

Technical Report:

Abstract

Low energy radio frequency (r.f.) electron beam (e-beam) sources have a potential application as drivers for FELs (free electron lasers) operating in the far-infrared and sub-millimeter (sub-mm) region since they can provide short pulses of coherent radiation in a spectral region not covered by conventional laser sources. A 5 MeV microtron capable of delivering 20 ps bunches with a 4A peak current was utilized at the ENEA (Italian Commission for Nuclear and Alternative Energy Sources) sub-mm FEL facility to drive a Cherenkov free electron laser designed to operate in the spectral region from 100 microns to 2 mm. In this type of device, a beam of relativistic electrons excites TM-like surface waves in a dielectric loaded waveguide when their velocity is close to the phase velocity of the wave in the guide. The longitudinal component of the evanescent electric field causes a bunching of the electrons giving rise to stimulated emission. This paper reports the observation of coherent emission in the microtron driven Cherenkov FEL when power up to 50 W in 4 micron pulses was generated at the wavelengths of 1.6 mm and 0.9 mm by using two different dielectric loaded waveguides. Tunning results obtained by varying the waveguide  More>>
Publication Date:
Jun 01, 1991
Product Type:
Technical Report
Report Number:
ENEA-RT-INN-90-36; CONF-901293-2; RT/INN-90-39
Reference Number:
SCA: 426002; 430301; 430303; PA: ITAN-91:002078; SN: 92000621816
Resource Relation:
Conference: Lasers `90: 13th international conference on lasers and applications,San Diego, CA (United States),10-14 Dec 1990; Other Information: DN: From International conference on lasers `90; San Diego, CA, USA (10-14 Dec 1990); PBD: Jun 1991
Subject:
42 ENGINEERING; 43 PARTICLE ACCELERATORS; FREE ELECTRON LASERS; CHERENKOV RADIATION; MICROTRONS; COHERENT RADIATION; RADIATION MONITORING; WAVEGUIDES; ELECTRON BEAMS; VELOCITY; TUNING; PERFORMANCE TESTING; EXPERIMENTAL DATA; 426002; 430301; 430303; LASERS AND MASERS; ION SOURCES; EXPERIMENTAL FACILITIES AND EQUIPMENT
OSTI ID:
10107026
Research Organizations:
ENEA, Frascati (Italy). Dipt. Sviluppo Tecnologie di Punta; Essex Univ., Colchester (United Kingdom); Dartmouth Coll., Hanover, NH (United States). Dept. of Physics and Astronomy
Country of Origin:
Italy
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1120-558X; Other: ON: DE92744007; TRN: 91:002078
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
ITAN
Size:
12 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Ciocci, F, Doria, A, Gallerano, G P, Giabbai, I, Kimmitt, M F, Messina, G, Renieri, A, and Walsh, J E. Observation of coherent mm wave radiation from microtron driven Cherenkov FEL. Italy: N. p., 1991. Web.
Ciocci, F, Doria, A, Gallerano, G P, Giabbai, I, Kimmitt, M F, Messina, G, Renieri, A, & Walsh, J E. Observation of coherent mm wave radiation from microtron driven Cherenkov FEL. Italy.
Ciocci, F, Doria, A, Gallerano, G P, Giabbai, I, Kimmitt, M F, Messina, G, Renieri, A, and Walsh, J E. 1991. "Observation of coherent mm wave radiation from microtron driven Cherenkov FEL." Italy.
@misc{etde_10107026,
title = {Observation of coherent mm wave radiation from microtron driven Cherenkov FEL}
author = {Ciocci, F, Doria, A, Gallerano, G P, Giabbai, I, Kimmitt, M F, Messina, G, Renieri, A, and Walsh, J E}
abstractNote = {Low energy radio frequency (r.f.) electron beam (e-beam) sources have a potential application as drivers for FELs (free electron lasers) operating in the far-infrared and sub-millimeter (sub-mm) region since they can provide short pulses of coherent radiation in a spectral region not covered by conventional laser sources. A 5 MeV microtron capable of delivering 20 ps bunches with a 4A peak current was utilized at the ENEA (Italian Commission for Nuclear and Alternative Energy Sources) sub-mm FEL facility to drive a Cherenkov free electron laser designed to operate in the spectral region from 100 microns to 2 mm. In this type of device, a beam of relativistic electrons excites TM-like surface waves in a dielectric loaded waveguide when their velocity is close to the phase velocity of the wave in the guide. The longitudinal component of the evanescent electric field causes a bunching of the electrons giving rise to stimulated emission. This paper reports the observation of coherent emission in the microtron driven Cherenkov FEL when power up to 50 W in 4 micron pulses was generated at the wavelengths of 1.6 mm and 0.9 mm by using two different dielectric loaded waveguides. Tunning results obtained by varying the waveguide gap are also reported.}
place = {Italy}
year = {1991}
month = {Jun}
}