Design of 700 MHz, 1 MW klystron for proton accelerator

Korea Accelerator and Plasma Research Association (KAPRA) is undertaking the first phase R&D for the 1MW, CW 700MHz klystron, which is targeting the future stage of the Proton Engineering Frontier Project (PEFP) accelerator at Korea Atomic Energy Research Institute (KAERI). The objectives of the first phase R&D are: (1) setting up all infra structures/procedures for the design and fabrication, (2) developing a prototype klystron for proofs of principles, and (3) making a performance test of the prototype at a reduced duty. The second phase R&D is supposed to cover full power, CW operation and reliability issues. A triode type electron gun, cavities, an output RF circuit, an RF window, a beam collector and an electro-magnet were designed to produce desired output rf power. Some parts were fabricated and tested, which is also briefly introduced in this paper.