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Description
S-band high-gradient accelerating structures were proposed to accelerate protons from 30MeV to 230MeV for a compact therapy Linac in IMP. A backward traveling wave structure and a high gradient standing wave structure were developed, and the differences between the two types of structures were analyzed. In this paper, A new-shaped accelerating structure with reduced coupling holes and thermal stress was developed, along with a novel cooling channel design, which allow the cooling water flow in the middle of the disk, thus make it possible for higher duty cycle and longer RF pulse operation. It provides a wider application scenario for the high gradient accelerating structure. The research of high gradient accelerating structure is consistent with the trend of linear accelerator technology (compact, flexible and economical). Design and optimization of the linac and the status of the prototype cavity will be discussed in this paper.
