Investigation of Electron Beam Parameter in Seeded THz-FEL Amplifier using Photocathode RF Gun

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• 作者：Kyohei Shimahashi ; Heishun Zen ; Kensuke Okumura ; Marie Shibata ; Hidekazu Imon ; Torgasin Konstantin ; Hani Negm ; Mohamed Omer ; Kyohei Yoshida ; Yong-Woon Choi ; Ryota Kinjo ; Kai Masuda ; Toshiteru Kii ; Hideaki Ohgaki
• 关键词：Electron beam parameter ; Free-electron laser ; Terahertz radiation ; Photocathode RF gun
• 刊名：Energy Procedia
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：34
• 期：Complete
• 页码：863-870
• 全文大小：357 K

文摘

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 m. Since the power of the seed light was 0.20 W, the light power was amplified almost 10⁴ times.