Power measurement for a sheet beam planar wiggler FEL amplifier

Author

Zhang ; Destler, W.W. ; Granatstein, V.L. ; Bidwell, S.W. ; Cheng, Shukang ; Rodgers, Jeremy

Author_Institution

Lab. for Plasma Res., Maryland Univ., College Park, MD, USA

fYear

1993

fDate

7-9 June 1993

Firstpage

199

Abstract

Summary form only given. The pulse power measurement for a sheet beam planar wiggler FEL (free-electron laser) amplifier experiment at UMCP (University of Maryland, College Park) is reported. The amplifier system consists of an EIO tube as power source, a waveguide taper, a miter bend, and a waveguide set in the wiggler. The EIO tube produces about 10 watts at 94 GHz. An antenna is set in the far-field region to pick up the radiation power from the open exit of the amplifier waveguide. The relation between the power picked up by the antenna and the total radiated power from the amplifier exit has been determined by calculations, based on far-field pattern analysis. Two different antennas were tested: a waveguide antenna at W-band and a horn antenna. It was found that the waveguide antenna is more efficient. Calibrations include tests of each part of the amplifier system and cold measurement of the whole system.

Keywords

free electron lasers; 10 W; 94 GHz; EIO tube; W-band; amplifier waveguide; calibrations; cold measurement; far-field pattern analysis; far-field region; free-electron laser; horn antenna; miter bend; pulse power measurement; radiation power; sheet beam planar wiggler FEL amplifier; waveguide antenna; waveguide taper; Free electron lasers; Horn antennas; Laser beams; Optical pulses; Power amplifiers; Power lasers; Power measurement; Pulse amplifiers; Pulse measurements; Undulators;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 1993. IEEE Conference Record - Abstracts., 1993 IEEE International Conference on

Conference_Location

Vancouver, BC, Canada

ISSN

0730-9244

Print_ISBN

0-7803-1360-7

Type

conf

DOI

10.1109/PLASMA.1993.593544

Filename

593544