CSNS RCS射频系统双谐波模式低电平控制模拟实验  

Simulation experiment on low-level RF control for dual-harmonic acceleration at CSNS RCS

作　　者：申泗荣[1] 李晓[1] 张春林[1] 孙虹[1] 唐靖宇[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《强激光与粒子束》2013年第11期2986-2990,共5页High Power Laser and Particle Beams

基　　金：中国散裂中子源预研项目

摘　　要：介绍了中国散裂中子源/快循环质子同步加速器一期工程(CSNS-Ⅰ/RCS)拟采用的双谐波加速方案。针对该方案需要在加速周期内对8个射频腔之一进行工作模式切换的特殊要求,对设计实现的基于现场可编程门阵列(FPGA)技术的数字化低电平控制系统采取了一系列优化措施,包括模式切换时段控制回路的开环、功率源两级调谐回路的错时闭环等。在射频系统样机平台开展的模拟实验表明该低电平控制系统动态性能良好,双谐波方案可行性得到了一定程度的验证。The design and test of the low-level RF （LLRF） control system for the dual-harmonic acceleration at the rapid cy cling synchrotron （RCS） of China Spallation Neutron Source （CSNS） at phase I is introduced. In order to implement the mode switch from the second harmonic to the fundamental during the acceleration cycle for one of the eight RF cavities, the LLRF sys tern for the cavity has been designed differently from the others. Several technical measures such as the opening of the control loops during the mode switch and the reclosing of two tuning circuits of the RF amplifier at different moments, have been taken. The experimental results on the testing platform based on an RF prototype show good dynamic performance of the LLRF system and prove the feasibility of dual harmonic operation.

关 键 词：中国散裂中子源 快循环同步加速器 双谐波加速 射频系统 低电平控制 

分 类 号：TL544[核科学技术—核技术及应用]