Nonrelativistic electron bunch train for coherently enhanced terahertz radiation sources
- Accelerator Systems Division and Argonne Accelerator Institute, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
We propose to generate a train of prebunched electron beams for producing coherently enhanced Smith-Purcell radiation [S. J. Smith and E. M. Purcell, Phys. Rev. 92, 1069 (1953)] in the terahertz wavelength range. In this scheme, a train of picosecond laser pulses is produced to drive a photoemission gun to generate a train of 50 keV electron pulses. The parameters are chosen so that the space-charge effect does not destroy the pulse time structure. Smith-Purcell radiation from the electron pulse train is enhanced due both to the short length of the individual electron bunch and to the repetitive structure of the beam. Example systems producing coherent terahertz power at about 1 mW are described.
- OSTI ID:
- 21016271
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 92; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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