[16p-Z11-1~14] 3.5 Laser system and materials

[16p-Z11-12] Development of self-resonating optical enhancement cavities for laser-Compton light sources

〇Yuuki Uesugi¹, Naoto Sugawara¹, Alexander Aryshev², Junji Urakawa², Tsunehiko Omori², Masafumi Fukuda², Seiya Otsuka³, Yuya Koshiba³, Masakazu Washio³, Tohru Takahashi⁴ (1.Tohoku Univ., 2.KEK, 3.Waseda Univ., 4.Hiroshima Univ.)

Keywords:Optical enhancement cavity, Laser-Compton light source

An optical enhancement cavitiy is a key device to increase the brightness of laser-Compton-based X-ray sources. Although high-finesse cavities can provide the laser storage with a high enhancement factor, maintaining the cavity resonance in accelerator facilities is often difficult due to large environmental noise. We proposed and have been developing a new scheme to accumulate the laser beam into the enhancement cavity named self-resonating optical enhancement cavity, which is not composed with an electronic feedback circuit for maintaing the cavity resonance. In this talk, we will show the development results of the self-resonating cavities by single longitudinal mode operation and mode-locked operation.