Study and Development of Extremely Short Pulse Coherent Terahertz Light Source Employing an Electron Isochronous Ring

束团长度在100 fs左右或更小的短脉冲电子束的产生方法已经基本建立。该方法采用行波加速结构和原始电子枪中的速度聚束机制。该电子枪由两个独立的腔室组成，以操纵和优化速度聚束方案的纵向相空间电子分布。加速器系统完成后，电子束成功加速至50 MeV，从而有可能使用弯曲磁铁和/或波荡器产生相干太赫兹（THz）辐射。由此可以得出结论，建立了辐射安全方案符合国家规定的太赫兹科学光源加速器设施。

Production method for short-pulse electron beam with its bunch length around 100 fs or less has been mostly established. The method employs the velocity bunching mechanism in a traveling-wave accelerating structure and an original electron gun. The gun is composed of two independent cavity cells so as to manipulate and optimize the longitudinal phase space electron distribution for the velocity bunching scheme. The accelerator system was completed, after which the electron beam was successfully accelerated up to 50 MeV, thereby it might be possible to produce coherent terahertz (THz) radiation using bending magnets and/or undulators. It can be concluded that a light source accelerator facility for THz science, in which radiation safety program was accurately approved by the national regulation, is established.