Numerical modeling of a high power terahertz source at Shanghai

Abstract

On the basis of an energy-recovery linac, a terahertz (THz) source with kilowatts average power is proposed in Shanghai, which will serve as an effective tool in material and biological sciences. In this paper, the physical design of two free electron laser (FEL) oscillators, in the frequency range of 2~10THz and 0.5~2THz respectively, are presented. By using three dimensional, time-dependent numerical modeling of GENESIS in combination with paraxial optical propagation code (OPC), the THz oscillator performances, the detuning effects, and the tolerance requirements on the electron beam, the undulator filed and the cavity alignment are given.