Amplification and superradiant emission from a 33.3 GHz free electron laser with a reversed axial guide magnetic field

Author

Conde, Manoel E. ; Bekefi, George

Author_Institution

Dept. of Phys., MIT, Cambridge, MA, USA

Volume

20

Issue

3

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

240

Lastpage

244

Abstract

A new regime of free-electron laser (FEL) operation using a helical wiggler field and a reversed axial guide magnetic field is reported. The orientation of the axial field is such as to oppose the electron rotation imparted by the helical field. The 33.3-GHz FEL amplifier is driven by a mildly relativistic electron beam (750 kV 300 A, 30 ns) and generates 61 MW of radiation with a 27% conversion efficiency. The results are compared with those obtained when the axial guide field is in its conventional orientation, where considerable loss of power and efficiency is observed

Keywords

free electron lasers; magnetic fields; masers; superradiance; wigglers; 27 percent; 300 A; 33.3 GHz; 61 MW; 750 kV; FEL amplifier; conversion efficiency; free electron laser; helical wiggler field; mildly relativistic electron beam; reversed axial guide magnetic field; superradiant emission; Cyclotrons; Electron beams; Electron emission; Free electron lasers; Magnetic field measurement; Magnetic fields; Orbital calculations; Orbits; Physics; Undulators;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.142825

Filename

142825