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

我们设计、制作了一个三维四镜光学腔，并进行了性能测试。获得了精细度为4000，平均功率为2.6kW的激光谐振腔，激光-电子相互作用点处垂直光斑的均方根尺寸为13±1μm。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.