Abstract
Simple, compact, and powerful seeded terahertz-free electron laser (THz-FEL) which consists of a photocathode radio-frequency gun, a focusing solenoid, an undulator and a THz wave parametric generator has been designed. A start-to-end calculation has been performed by using the particle tracking code PARMELA and the FEL gain simulation code GENESIS1.3. To obtain a higher FEL gain, we searched a better condition of the electron beam parameter and the seed light. In the present design scheme, the FEL peak power was calculated to be 3 kW at the FEL resonant wavelength of 179 mu m. Since the power of the seed light was 0.20 W, the light power was amplified almost 10(4) times. (C) 2013 The Authors. Published by Elsevier B.V.