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1.中国科学院上海应用物理研究所 嘉定园区 上海 201800;
2.中国科学院大学 北京 100049
[ "唐兴海,男,1988年出生,2011年毕业于中南大学,现为硕士研究生,研究领域为加速器控制系统及上层应用软件开发", "TANG Xinghai, male, born in 1988, graduated from Central South University in 2011, master student, focusing on the LLRF control system and application software development" ]
顾强,E-mail:guqiang@sinap.ac.cn GU Qiang, E-mail: guqiang@sinap.ac.cn
收稿日期:2016-03-14,
修回日期:2016-03-31,
纸质出版日期:2016-07
移动端阅览
唐兴海, 刘亚娟, 张俊强, 等. 基于MicroTCA的自动频率控制系统[J]. 核技术, 2016,39(7):070102
Xinghai TANG, Yajuan LIU, Junqiang ZHANG, et al. An automatic frequency control system based on MicroTCA[J]. Nuclear techniques, 2016, 39(7): 070102
唐兴海, 刘亚娟, 张俊强, 等. 基于MicroTCA的自动频率控制系统[J]. 核技术, 2016,39(7):070102 DOI: 10.11889/j.0253-3219.2016.hjs.39.070102.
Xinghai TANG, Yajuan LIU, Junqiang ZHANG, et al. An automatic frequency control system based on MicroTCA[J]. Nuclear techniques, 2016, 39(7): 070102 DOI: 10.11889/j.0253-3219.2016.hjs.39.070102.
高品质的束流是产生高品质同步辐射光或自由电子激光的关键,电子直线加速器作为同步辐射光源的注入器,其性能表现直接影响到束流品质。为降低噪声(温度变化、机械振动等)的干扰,本文研究和实现了一个通用、鲁棒、高效、可扩展性好的电子直线加速器低电平控制系统。目前已经实现了自动频率控制(Automatic Frequency Control
AFC)功能,更多控制功能将会陆续实现。该系统基于MicroTCA,选用实验物理与工业控制系统(Experimental Physics and Industrial Control System
EPICS)架构,采用C/C++开发,利用PID (Proportion-Integral-Differential)算法和最小二乘法,能够采用两种不同的方法进行自动频率控制。在巴西Sirius光源直线加速器实验装置上对该控制系统进行调试和测试,结果表明,两种AFC方法都是有效的,且存在明显差异,未来将进一步优化和完善。
Background
2
High quality electronic beam is the key to produce high quality synchrotron radiation or free-electron laser (FEL). Microwave electronic LINAC plays the role of injector
whose performance influences the quality of electronic beam deeply.
Purpose
2
In order to minimize the noise interference (temperature
microphonics
etc)
we develop a universal
robust
efficient and extendible Low Level Radio Frequency (LLRF) control system
in which automatic frequency control (AFC) function is already implanted and more functions will be embedded in the future. Methods: This system
based on MicroTCA
adopts Experimental Physics and Industrial Control System (EPICS) structures
and develops in C/C++. The core algorithms are Proportion-Integral-Differential (PID) and Least-Squares method.
Results
2
Two different ways of AFC were realized and the system was tested on Sirius-LINAC test facility.
Conclusion
2
The result shows that the cavity is well tuned when the AFC system is on
and obvious differences are found. This system will be optimized and enlarged in the future.
赵 明华 , 林 国强 , 钟 少鹏 , . 上海光源150. MeV电子直线加速器的设计与调试 . 中国物理C , 2008 . 32 ( 增1 ): 244 - 246 .
Minghua ZHAO , Guoqiang LIN , Shaopeng ZHONG , . Design and commissioning of a 150 MeV linac for SSRF . Chinese Physics C , 2008 . 32 ( Suppl 1 ): 244 - 246 .
汪 宝亮 , 赵 明华 , 侯 汨 , . 上海光源次谐波聚束器的优化设计及测试 . 强激光与粒子束 , 2008 . 20 ( 6 ): 1053 - 1056 .
Baoliang WANG , Minghua ZHAO , Mi HOU , . Optimization and test of sub-harmonic buncher for Shanghai Synchrotron Radiation Facility . High Power Laser and Particle Beams , 2008 . 20 ( 6 ): 1053 - 1056 .
后接. 上海光源储存环闭轨校正与轨道慢反馈研究[D]. 上海:中国科学院上海应用物理究所, 2008.
HOU Jie. Study of closed orbit correction and slow orbit feedback for the SSRF storage ring[D]. Shanghai:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2008
张 俊强 , 殷 重先 , 高 永强 , . FPGA实现次谐波聚束器的幅相控制 . 核技术 , 2012 . 35 ( 7 ): 499 - 502 .
Junqiang ZHANG , Chongxian YIN , Yongqiang GAO , . An FPGA-based amplitude and phase control of sub-harmonic buncher . Nuclear Techniques , 2012 . 35 ( 7 ): 499 - 502 .
李林. 软X射线自由电子激光LLRF控制系统建模及算法研究[D]. 上海:中国科学院上海应用物理究所, 2015.
LI Lin. RF system modeling and research on algorithm of digital low level RF system of soft X-ray free electron lasers[D]. Shanghai:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2015
Martin K, Lyudvig P, Christian S, et al. Drivers and software for MicroTCA.4[R]. Dresden, Germany, 2014. DOI:10.1109/RTC.2014.7097449 http://dx.doi.org/DOI:10.1109/RTC.2014.7097449
阎映炳. 上海光源束流位置测量数据采集系统研制及初步应用研究[D]. 上海:中国科学院上海应用物理究所, 2009.
YAN Yingbing. Research of SSRF BPM data acqusition system and preliminary application[D]. Shanghai:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2009
Thomas S. Vector sum control of pulsed accelerating fields in lorentz force detuned superconducting cavities[D]. Hamburg:DESY, 1998
Farkas Z D, Hogg H A, Loew G A. SLED:a method of doubling slac's energy[R]. SLAC-PUB-1453, 1974
Rong L Y, Yao Y, Xu X N, et al. The improvements of LLRF control system for CSNS LINAC[R]. Lawrence Berkeley National Laboratory, 2013
原通文. 基于嵌入式系统的电子直线加速器自动频率跟踪系统[D]. 北京:北京机械工业自动化研究所, 2002.
YUAN Tongwen. An AFC system of LINAC based on embeded-system[D]. Beijing:Beijing Research Institute of Automation for Machinery Industry, 2002
范 咏峰 , 李 平 . 浅析PID参数整定 . 中国仪器仪表 , 2002 . ( 3 ): 24 - 28 . DOI: 10.3969/j.issn.1005-2852.2002.03.008 http://doi.org/10.3969/j.issn.1005-2852.2002.03.008 .
Yongfeng FAN , Ping LI . PID controller tuning . China Instrumentation , 2002 . ( 3 ): 24 - 28 . DOI: 10.3969/j.issn.1005-2852.2002.03.008 http://doi.org/10.3969/j.issn.1005-2852.2002.03.008 .
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