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.
出处
《核技术》
CAS
CSCD
北大核心
2012年第7期499-502,共4页
Nuclear Techniques
关键词
FPGA低电平
次谐波聚束器
幅相控制
FPGA, LLRF, Sub-harmonic buncher, Amplitude and phase control
