Generation of pre-bunched electron beams in photocathode RF gun for THz-FEL superradiation

详细信息    查看全文

• 作者：Shengguang Liu^a ; ^{liushg@ihep.ac.cn} ; Yen-Chieh Huang^b
• 关键词：THz-FEL ; Photocathode RF gun ; Pre-bunched electron beam ; Superradiation
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2011
• 出版时间：1 May, 2011
• 年：2011
• 卷：637
• 期：1_supp_S
• 页码：S172-S176
• 全文大小：1K

文摘

A simple laser technology is proposed to generate a laser pulse sequence with a pulse rate of 2 THz frequency. The laser pulse sequence is used as the driving laser for a photocathode radio frequency (RF) gun. The RF gun generates the pre-bunched electron beams into an undulator for immediate superradiation. Terahertz (THz) radiation, based on a free electron laser (FEL) at a megawatt (MW) level, could be achieved from a compact FEL facility. We describe the laser handling technology for a 16-pulse laser. The detailed calculation of the bunching factor due to the injection phase, beam charge, and bunch number, as well as the differences in the time spacing and energy spread among the laser pulses, are also presented.