Present Status of Quantum Radiation Sources on the Basis of the S-band Compact Electron Linac

Quantum radiations sources such as a laser Compton scattering (LCS) X-ray and coherent THz radiation sources have been developed on the basis of the S-band compact electron linac at AIST in Japan. The compact Xray source is required for biological, medical and industrial science because it has many benefits such as short pulse, quasi-monochromatic, energy tunability and good directivity. The X-ray source is conventionally operated with the single collision system between an electron pulse and a laser pulse for the medical imaging. To increase X-ray yields, we have developed a multicollision system with a multi-bunch electron beam and a laser optical cavity. The multi-bunch beam generation has already been carried out with a Cs-Te photocathode rf gun system. The prototype of the laser optical cavity has preliminary built like a regenerative amplifier including the collision point. The coherent THz radiation have been performed using an ultra-short electron bunch and been applied for a THz scanning transmission imaging. The THz Time-domain spectroscopy (TDS) has also developed using this high power THz pulse. In this conference, we will describe a present status of the LCS X-ray, coherent THz radiation sources, and their applications.