FPGA实现次谐波聚束器的幅相控制  

An FPGA-based amplitude and phase control of sub-harmonic buncher

作　　者：张俊强[1,2] 殷重先[1] 高永强[3] 俞路阳[1] 赵明华[1] 钟少鹏[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049 [3]临沂大学,山东临沂276005

出　　处：《核技术》2012年第7期499-502,共4页Nuclear Techniques

摘　　要：为满足上海光源Top-up运行模式的需要,保证光源直线加速器提供稳定的、高品质的束流,研制了次谐波聚束器的低电平控制系统。以可编程逻辑门阵列(FPGA)为基础,利用上下变频、IQ调制解调技术实现了次谐波聚束器幅度和相位的反馈控制。介绍了数字化技术的原理及上层应用程序的开发,并进行桌面测试,实现了幅度控制精度1%、相位控制精度1的技术指标。To satisfy the Top-up operation mode of Shanghai Synchrotron Radiation Facility（SSRF）, and ensure the linac to provide stable and high current beam bunches, a low level radio frequency（LLRF） control system was developed for sub-harmonic buncher. Based on field programmable gate array （FPGA）, LLRF realized digital amplitude and phase feedback control by using up-down converter, IQ modulator and demodulator techniques. Digital principles and application programs were introduced, and table test was performed. The LLRF system achieved an amplitude control accuracy rate of ± 1% and phase control accuracy of ± 1°, well meeting the design requirement.

关 键 词：FPGA低电平 次谐波聚束器 幅相控制 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]