Design and simulations of CAEP THz FEL resonator

Yuhuan Dou; Xiaojian Shu; Derong Deng; Xingfan Yang; Ming Li

doi:10.1117/12.2064931

3 February 2015 Design and simulations of CAEP THz FEL resonator

Yuhuan Dou, Xiaojian Shu, Derong Deng, Xingfan Yang, Ming Li

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92554N (2015) https://doi.org/10.1117/12.2064931
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

A high power China Academy of Engineering Physics(CAEP) THz free electron laser (FEL) is designed and optimized in a radiation frequency range of 1~3 THz and average output power of about 10 W. The main work focuses on the optimization of different schemes through physical analysis. The wiggler peak field strength and electron beam energy have been selected with eleven frequencies ranging from 1 THz to 3 THz. It is found that the values of the gain and output power of the cavity are largest at 2.6 THz. So we can test the facility at this frequency. While the value of the output power is less than the design goal at the lower frequency region of about 1.0 THz due to the serious slippage between the electron bunch and radiation pulse. To increase the output power at the lower frequency region, the scheme of elliptical hole-coupling optical resonator is proposed to solve this problem. The simulation results show that the elliptical hole-coupling output is effective and applicable for the THz FEL and the output power can be increased by more than 30%.

Citation Download Citation

Yuhuan Dou, Xiaojian Shu, Derong Deng, Xingfan Yang, and Ming Li "Design and simulations of CAEP THz FEL resonator", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92554N (3 February 2015); https://doi.org/10.1117/12.2064931

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KEYWORDS

Terahertz radiation

Free electron lasers

Resonators

Electron beams

Optical resonators

Mirrors

Computer simulations

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