| Paper |
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| TUPPH048 |
Superradiant Smith-Purcell Radiation in the Terahertz-wave Region from Bunched Electron Beams
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435 |
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- Z. Shi, Z. Liang, Z. Yang
UESTC, Chengdu, Sichuan
- K. Imasaki, D. Li
ILT, Suita, Osaka
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This paper presents a study of the characteristic of Smith-Purcell radiation (SPR) in the terahertz-wave (THz) region from bunched electron beams. The model consists of a grating with different period length and grating profile to be driven by a single electron bunch and a train of periodic bunches, respectively. The radiation efficiency and the angular distribution of SPR with various bunch distribution functions are investigated. According to the analysis, the coherent emission will occur when electron bunches are short compared with the radiation wavelength, and the coherent emission strongly depends on the longitudinal distribution of bunches. Some numerical results for the sinusoidal grating are compared with those for echellette grating .The results show that the THz radiation will be obtained using the reasonable parameters for the bunches and the grating. The results provide a basis for designing a superradiant SP free-electron laser in the THz wavelength region.
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