摘要
C-ADS项目的注入器ⅡRFQ加速腔射频耦合器是为该四翼型常温射频四极场(RFQ)加速器专门设计的一种高功率耦合器件,其主要特点是采用碗状陶瓷窗结构及合理的生产工艺,很好地解决了耦合器传输阻抗匹配问题。该耦合器主要由内外导体、陶瓷窗、耦合环及多路水冷却回路组成,并在陶瓷窗内表面电镀氮化钛涂层以降低由于次级电子倍增效应所带来的发热,在相同频率和功率等级下结构更加紧凑,达到了C-ADS项目的四翼型腔体馈送120kW射频功率的目的。在2014年7月中旬实现了10mA、2.1 MeV束流的加速,为该项目的四翼型直线加速器出束提供了必要的硬件支持。该耦合器可为相近频率、类似功率等级的耦合器提供技术参考,并在国内的加速器领域具有一定的指导意义。
The coupler, which belongs to the field of proton linear accelerator technolo- gy, was designed for a four-vane radio frequency quadrupole （RFQ） accelerator as a high power coupling device. It adopts a new bowl-shaped ceramic window structure spe- cially, and its reasonable structural design provides a good solution to transmission impedance matching. The coupler consists of inner conductor, outer conductor, ceramic window, coupling loop and complicated water cooling channels. And the nitride titani- um coating on the surface of ceramic window can prevent temperature rising from mul- tipacting phenomenon. The radio frequency （RF） power achieved rated value of 120 kW through two identical compact couplers on the RFQ cavity in July 2014, and the meas- ured results meet the requirements of original dynamics design of 2.1 MeV output ener- gy and 10 mA beam current. The design of the coupler structure provides an abundant technical reference for the RF design of couplers with the similar power and frequency scale in civil related field.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2015年第B10期539-542,共4页
Atomic Energy Science and Technology
基金
中国科学院战略性先导科技专项资助项目(XDA030205)
