The generation and observation of coherent THz undulator radiation from femtosecond electron bunches in Shanghai Institute of Applied Physics Femtosecond Accelerator device is reported.In this paper the experiment set...The generation and observation of coherent THz undulator radiation from femtosecond electron bunches in Shanghai Institute of Applied Physics Femtosecond Accelerator device is reported.In this paper the experiment setup and first result of spatial distribution of power radiation are given.展开更多
Based on the femtosecond accelerator facility at Shanghai Institute of Applied Physics (SINAP), a conventional far-infrared Michelson interferometer was built to measure the bunch length by means of optical autocorrel...Based on the femtosecond accelerator facility at Shanghai Institute of Applied Physics (SINAP), a conventional far-infrared Michelson interferometer was built to measure the bunch length by means of optical autocorrelation. However, according to the preliminary experiment result, the resolution of interferometer is not good enough, because the mirror-driving mechanism makes the moving mirror tend to tilt or wobble as it retards. Considering of the allowable errors, we calculate the maximum allowable titling angle of the moving mirror, and discuss the alignment plan in this paper.展开更多
Based on a femtosecond linear accelerator, here we present a study of the use of a groove guide as the FEL interaction structure for high power FEL experiment. The transmission and attenuation characteristics of the d...Based on a femtosecond linear accelerator, here we present a study of the use of a groove guide as the FEL interaction structure for high power FEL experiment. The transmission and attenuation characteristics of the dominant mode in the groove guide are discussed. And the coherent spontaneous emission in the FEL is simulated by Gover theory.展开更多
基金Supported by High power THz radiation source base on femtosecond electron bunch (28060701)
文摘The generation and observation of coherent THz undulator radiation from femtosecond electron bunches in Shanghai Institute of Applied Physics Femtosecond Accelerator device is reported.In this paper the experiment setup and first result of spatial distribution of power radiation are given.
基金Supported by Major State Basic Research Development Program of China (2002CB713600)
文摘Based on the femtosecond accelerator facility at Shanghai Institute of Applied Physics (SINAP), a conventional far-infrared Michelson interferometer was built to measure the bunch length by means of optical autocorrelation. However, according to the preliminary experiment result, the resolution of interferometer is not good enough, because the mirror-driving mechanism makes the moving mirror tend to tilt or wobble as it retards. Considering of the allowable errors, we calculate the maximum allowable titling angle of the moving mirror, and discuss the alignment plan in this paper.
文摘Based on a femtosecond linear accelerator, here we present a study of the use of a groove guide as the FEL interaction structure for high power FEL experiment. The transmission and attenuation characteristics of the dominant mode in the groove guide are discussed. And the coherent spontaneous emission in the FEL is simulated by Gover theory.
