PROJECT OF THE SHORT PULSE FACILITY AT KAERI

A low-energy electron accelerator with subpicosecond electron bunches is under construction at the Korea Atomic Energy Research Institute (KAERI). It will serve as a user facility for high-energy ultrafast electron diffraction and synchronized high-power terahertz pulse and short x-ray pulse generation. The accelerator consists of an RF gun with a photocathode and 20-MeV linac. The bunching of an accelerated beam is achieved in a ninety- degree achromatic bend. After that, a fast kicker deflects some of the bunches to the target for x-ray generation, and other bunches come to the terahertz radiator (undulator or multifoil). Bunches from the RF gun are also planned for use in ultrafast electron diffraction. Some details of the design, current status of the project, and future plans are described.