Development of a three dimensional four mirror optical cavity for laser-Compton scattering

利用激光-康普顿散射法研制了一种用于发展强光子源的三维四镜光学腔，并对其进行了设计、制作和性能测试。在激光-电子相互作用点的垂直光斑尺寸为13±1μm的情况下，获得了4000kW的精细度和2.6kW的平均功率。结果，我们观测到124±1个光子，平均能量为24 MeV/束，相当于每秒产生2.7×108个光子。

We made the design, fabrication, and performance test of a three-dimensional 4-mirror optical cavity for development of intense photon sources by laser-Compton scattering. We achieved the finesse of 4000 and average power of 2.6 kW in the cavity with the vertical laser beam spot size of 13±1μm in RMS at the laser-electron interaction point. As a result, we observed 124±1 photons with average energy of 24 MeV per beam crossing, which corresponds to the generation of 2.7×108photons per second.