KAERI has been developed a compact laser-plasma electron accelerator and a gamma-ray source using laser accelerated electrons to provide easy-accessible systems for many applications. For gamma-rays, the laser-acceleration can localize the electron acceleration, giving the compact gamma-ray source. As we know, laser accelerators are good for compact size due to localized shielding at the expense of low average flux, while linear RF accelerators are good for high average flux. (více ...)