RF system design for petal- shaped irradiation accelerator NB100

The paper introduces the RF system overall solutions and design process for the petal- shaped irradiation accelerator NB100, such as the magnetic coupling design of the input components, the mode connected by coaxial transmission line between RF power source and accelerating cavity, the choice of flat window as the isolation window. Final design data and graphics for coupling loop are also included. With the RF system being put into use, the initial test shows that, the continuous input power is 100 kW and the pulse power is 250 kW when the standing wave ratio is less than 1.1. The rationality of the RF system design scheme is confirmed.