| Paper | Title | Page |
|---|---|---|
WEOBNO01 |
Design and Simulation of CAEP THz FEL | |
|
||
|
Funding: The work was supported by National Natural Science Foundation of China under Grant 11105019; National Major Instrumentation Special under Grant 2011YQ130018 and Project 2011B0401066 supported by CAEP. Design and simulation of CAEP THz free electron laser (FEL) have been carried out using our 3D-OSIFEL code. The main work focuses on the optimization to different parameters of optical resonator and wiggler. The wiggler peak field strength and electron beam energy have been selected with eleven frequencies ranging from 1 THz to 3 THz. The gain and power of resonator are calculated, which are corresponding to eleven frequencies. It can be seen by simulation results that when facility works at 2.6 THz, the gain and output power are the highest in the frequency range from 1 THz to 3 THz. So the experiment may be conducted at this frequency first. When the device works toward 1 THz, the slippage length and the loss of optical resonator will increase due to the increase of the radiation wavelength, which results in the reduction of the gain and output power. So experiment running at 1THz could be challenged and the scheme of elliptical hole-coupling optical resonator is proposed to solve the 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%. |
||