Design, fabrication, and cold test of an S-band high-gradient accelerating structure for compact proton therapy facility

• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS
• 页码范围: 38-48
• 页数: 11页
• 语种: 英文

摘要

An S-band high-gradient accelerating structure is designed for a proton therapy linear accelerator (linac) to accommodate the new development of compact,singleroom facilities and ultra-high dose rate (FLASH) radiotherapy.To optimize the design,an efficient optimization scheme is applied to improve the simulation efficiency.An S-band accelerating structure with 2856 MHz is designed with a low beta of 0.38,which is a difficult structure to achieve for a linac accelerating proton particles from 70 to 250 MeV,as a high gradient up to 50 MV/m is required.A special design involving a dual-feed coupler eliminates the dipole field effect.This paper presents all the details pertaining to the design,fabrication,and cold test results of the S-band high-gradient accelerating structure.