中国工程物理研究院FEL-THz束线从头至尾模拟设计(英文)

中国工程物理研究院正在开展自由电子激光太赫兹源(FEL-THz)的研究。介绍了中物院FEL-THz束线的设计,通过PARMELA和TRANSPORT等程序优化了束线参数,并通过IMPACT-T和ELEGANT程序核对了模拟结果。优化结果表明,电子束在摇摆器入口处能量7～8MeV、平均电流5mA、横向归一化发射度小于10mm·mrad,满足设计要求。

Start-to-end simulation of CAEP FEL-THz beamline

A THz free electron laser (FEL-THz) is being constructed in China Academy of Engineering Physics (CAEP) with the aim of proving high-power, monochromatic and tunable radiation for research in a variety of experimental fields. This facility consists of an injector equipped with a photo-cathode direct current gun, an achromatic transfer line, and an undulator for THz radiation. The physical design of the beamline is accomplished with the PARMELA and TRANSPORT programs. Start-to-end simulation is performed and the result is crosschecked with the codes of IMPACT-T and ELEGANT. The results show that it is feasible to achieve an electron beam with energy of 7~8 MeV, beam current of about 5 mA, and normalized transverse emittance typically below 10 mmmrad at the entrance of the undulator.