摘要
C-ADS注入器Ⅱ的RFQ射频系统是该强流加速器的关键一环,它通过两台完全一样的耦合器为一台四边形四翼型RFQ提供和传送功率。该射频系统在设计之初就考虑为10mA连续束流而进行特殊优化,从功率源、耦合器和功率传输系统几个方面对其进行详细介绍,尤其是针对CW模式下的系统稳定运行以及设备可靠性等方面进行的特殊考虑和模拟方法。该系统已经在2015年通过了10mA连续束的测试,证实了该射频系统的设计和调试符合物理的实验需求。特别阐述了该系统中一种新的碗型陶瓷窗耦合器的设计思路和一种无环形器情况下的特殊的耦合系数调谐方法,同时推导了双端口耦合的计算方法的具体设置过程。
The RF system is a key part of the high intensity RFQ (Radio Frequency Quadrupole) accelerator in the project of Chinese Accelerator Driven System (C-ADS), which provides and transfers power for a quadrilateral four-vane resonator with two coupling ports. A special scheme was considered for accelerating 10 mA proton beam since the beginning of RFQ design. In this paper, the strategy for RF system, which is very important for demand of CW (continuous wave) operating mode, is considered; performance of the elements including an RF amplifier, couplers and a transmission system will be calculated and analyzed carefully to ensure they can operate reliably and safely. A test with 10 mA CW proton beam was carried out in 2015 to verify the design and configuration. Specially, a new kind of coupler with bowl-shaped ceramic window and a novel tuning method without circulator during beam commissioning are presented in detail, and the specific two-port configuration is deduced for accelerator operation firstly.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2017年第6期108-116,共9页
High Power Laser and Particle Beams
基金
supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA030205)
关键词
射频系统
射频四极铁加速腔
耦合器
传输线
调谐方法
双端口耦合设置
RF system
Radio Frequency Quadrupole (RFQ) cavity
coupler
transmission line
tuning method
two-port configuration