Design of a new compact THz source based on Smith-Purcell radiation

中国物理C, 2009, 33(z2): 139-141.

^1, , ^2, , ^3,

1.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of the Chinese Academy of Sciences,Beijing 100049,China

2.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of the Chinese Academy of Sciences,Beijing 100049,China

3.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China

Design of a new compact THz source based on Smith-Purcell radiation

DAI Dong-Dong ^1, , BEI Hua ^2, , DAI Zhi-Min ^3,

1.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of the Chinese Academy of Sciences,Beijing 100049,China

2.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China;Graduate School of the Chinese Academy of Sciences,Beijing 100049,China

3.Shanghai Institute of Applied Physics,the Chinese Academy of Sciences,Shanghai 201800,China

Keywords： Smith-Purcell radiation

In recent years,people are dedicated to the research work of finding compact THz sources with high emission power.Smith-Purcell radiation is qualified for the possibility of coherent enhancement due to the effect of FEL mechanism.The compact experiment device is expected to produce hundreds mW level THz ray.The electron beam with good quality is provided under the optimized design of the electron gun.Besides,the grating is designed as an oscillator without any external feedbacks.While the beam passes through the grating surface,the beam bunching will be strong and the second harmonics enhancement will be evident,as is seen from the simulation results.

参考文献

[1]	Smith S J;Purcell E M .Visible Light from Localized Surface Charges Moving across a Grating[J].Physical Review,1953,92(04):1069.
[2]	ZHU X K;JIANG D K;GUO P L.Shanghai Electron Beam Ion Trap:Design and Current Status[M].Journal of Physics:Condensed Matter,2004:65.
[3]	QIAN L.Study on the Performance of EBIT's Electron Beam[A].Shanghai Institute of Applied Physics Shanghai,2004
[4]	Hermann G J .Optical Theory of Thermal Velocity Effects in Cylindrical Electron Beams[J].Journal of Applied Physics,1958,29:127-136.
[5]	BEI H;DAI D D;DAI Z M.Simulation of Smith-Purcell Radiation from Compact Terahcrtz Source[M].High Power Laser and Particle Beams

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Design of a new compact THz source based on Smith-Purcell radiation

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