Research and development of a drive laser system for a photocathode gun of an energy-recovery-linac light source

为了在能量回收直线加速器（ERL）中产生高质量、高电流的电子束，研制了一种基于光纤激光器的驱动ERL电子枪的激光系统，该系统具有高稳定性和高输出功率的特点。在1.3GHz的高重复频率下，束流为10mA时获得了高于目标值的输出功率。该系统已被用于KEK的测试ERL设施，紧凑型ERL，它被证明可以稳定地作为ERL驱动激光器工作。 它可望应用于自由电子激光器的电子枪以及ERL和加速器中的各种激光系统。

In order to generate a high-quality and high-current electron beam in an energy recovery linacs (ERL), a promising candidate of the next-generation light source, a laser system driving an electron gun of the ERL was developed based on a fiber laser, which was expected to be highly stable for high output power. A higher output power than the target value for the beam current of 10mA was achieved at the high-repetition rate of 1.3 GHz by a developed laser system. The system has been used for a test ERL facility at KEK, the Compact ERL and it demonstrated to stably work as the ERL drive laser. It is greatly expected to be applicable to electron guns of FELs as well as ERLs and various laser systems in accelerators.