Coherent terahertz radiation from optically pre-bunched electron beams

Author

Fiorito, R.B. ; Neumann, J. ; Freund, H.P. ; O´Shea, P.G. ; Loos, H. ; Sheehy, B. ; Carr, G.L. ; Graves, W.S.

Author_Institution

Inst. for Res. in Electron. & Appl. Phys., Maryland Univ., College Park, MD, USA

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

607

Lastpage

608

Abstract

A bunched electron beam is an efficient source of coherent radiation at wavelengths longer than the bunch length. We describe an experiment demonstrating electron density modulation at 0.8 THz using an optically modulated drive laser to extract a prebunched beam from an RF photoinjector, which is preserved through acceleration to 75 MeV. Measurements of coherent THz transition radiation (CTTR) are presented at the prebunch frequency showing enhanced production over that produced from an unmodulated beam.

Keywords

electron accelerators; electron density; laser beam effects; optical modulation; particle beam bunching; submillimetre waves; transition radiation; 0.8 THz; RF photoinjector; coherent THz transition radiation; coherent terahertz radiation; electron density modulation; optically modulated drive laser; optically prebunched electron beams; prebunch frequency; unmodulated beam; Acceleration; Electron beams; Electron optics; Frequency measurement; Laser beams; Laser transitions; Optical beams; Optical modulation; Particle beams; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on

Print_ISBN

0-7803-8490-3

Type

conf

DOI

10.1109/ICIMW.2004.1422237

Filename

1422237