[13p-2D-1~9] 3.5 Laser system and materials

[13p-2D-7] Development of a high average power laser for high brightness X-ray source and imaging at cERL

〇(P)Atsushi Kosuge¹, Tomoya Akagi¹, Yosuke Honda¹, Sakae Araki¹, Junji Urakawa¹, Nobuhiro Terunuma¹, Michiaki Mori², Ryoji Nagai², Toshiyuki Shizuma², Ryoichi Hajima² (1.KEK, 2.JAEA)

Keywords:enhancement cavity,Laser-Compton Scattering,X-ray imaging

High brightness X-rays via laser-Compton scattering (LCS) of laser photons stored in an optical cavity by a relativistic electron beam is useful for many scientific and industrial applications such as X-ray imaging. The construction of compact Energy Recovery Linac (cERL) is now in progress at KEK to generate low-emittance and high-current electron beams. In order to demonstrate the generation of high brightness LCS X-rays, it is necessary to develop a high average power injection laser and an optical four-mirror ring cavity with two concave mirrors which is used to produce a small spot laser beam inside the cavity. In this presentation, we will show the result of the development of the high average laser system, the LCS X-rays generation, and the X-ray imaging.