基于高精度脉冲发生器的定时系统设计
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摘要
为满足自由电子激光装置的正常运行需求,需要向加速器设备提供精确的定时触发信号。依据上海软X射线自由电子激光装置(Soft X-ray Free-Electron Laser Facility,SXFEL)的物理需求和系统分配,基于高精度脉冲发生器,结合具有联锁接口的光电转换器,实现了SXFEL定时系统的硬件设计。系统的软件部分使用实验物理与工业控制系统(Experimental Physics and Industrial Control Systems,EPICS)完成基于网络的分布式远程控制。通过在线测试,该系统运行稳定可靠,抖动时间小于150 ps,满足加速器对定时系统的要求。
[Background] The Soft X-ray Free-Electron Laser(SXFEL) is the fourth generation light source. The timing system is the key subsystem of the accelerator which can provide accurate timing trigger signal for the devices. [Purpose] This study aims to design a timing system which can totally meet the requirements of SXFEL facility operation. [Methods] According to the physical requirements and system physical equipments allocation of SXFEL, the hardware design of the timing system was based on the high precision pulse generator to realize high precision timing signals. The machine protection system(MPS) interface circuit and photoelectric converter for long distance transmission were developed as well. Experimental Physics and Industrial Control Systems(EPICS) was employed to perform the network-based distributed remote control system. [Results & Conclusions] The system works stably and reliably during the on line operation. The test results show that the jitter time is less than 150 ps,satisfying accelerator's requirements for timing system.
[Background] The Soft X-ray Free-Electron Laser(SXFEL) is the fourth generation light source. The timing system is the key subsystem of the accelerator which can provide accurate timing trigger signal for the devices. [Purpose] This study aims to design a timing system which can totally meet the requirements of SXFEL facility operation. [Methods] According to the physical requirements and system physical equipments allocation of SXFEL, the hardware design of the timing system was based on the high precision pulse generator to realize high precision timing signals. The machine protection system(MPS) interface circuit and photoelectric converter for long distance transmission were developed as well. Experimental Physics and Industrial Control Systems(EPICS) was employed to perform the network-based distributed remote control system. [Results & Conclusions] The system works stably and reliably during the on line operation. The test results show that the jitter time is less than 150 ps,satisfying accelerator's requirements for timing system.
引文
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5 Zhang W Y,Liu X Q,Feng L,et al.2.856 GHz microwave signal extraction from mode-locked Erfiber lasers with sub-100 femtosecond timing jitter[J].Nuclear Science and Techniques,2018,29(6):91.DOI:10.1007/s41365-018-0419-8.
6李刚,赵籍九,陈伯飞,等.BEPCⅡ储存环真空控制系统[J].原子能科学技术,2010,44(4):504-507.LI Gang,ZHAO Jijiu,CHEN Bofei,et al.Vacuum control system of BEPC II storage ring[J].Atomic Energy Science and Technology,2010,44(4):504-507.
7刘鸣,殷重先,赵黎颖,等.新型定时系统设计[J].核技术,2010,33(6):425-428.LIU Ming,YIN Chongxian,ZHAO Liying,et al.Design of a novel timing system[J].Nuclear Techniques,2010,33(4):425-428.
8邵娟.基于SCPI协议的可编程直流电源设计[D].苏州:苏州大学,2016.SHAO Juan.Design of a programmable DC power supply system based on SCPI[D].Suzhou:Soochow University,2016.
9 EPICS Stream Device User's Guide[EB/OL].2016-07[2018-11].http://epics.web.psi.ch/software/streamdevice/doc/.
10 Wang J G,Liu X Q,Feng L,et al.Analysis of electrooptical intensity modulator for bunch arrival-time monitor at SXFEL[J].Nuclear Science and Techniques,2019,30(1):3.DOI:10.1007/s41365-018-0524-8.
2谷端,赵明华.上海软X射线自由电子激光束流准直[J].强激光与粒子束,2012,24(9):2183-2186.GU Duan,ZHAO Minghua.Beam alignment for SXFEL[J].High Power Laser and Particle Beams,2012,24(9):2183-2186.
3赵江,陈又新,黄玉珍,等.重离子加速器同步定时触发系统的实现[J].原子能科学技术,2014,48(10):1899-1903.ZHAO Jiang,CHEN Youxin,HUANG Yuzhen,et al.Implement of synchronous timing trigger system in heavy ion accelerator[J].Atomic Energy Science and Technology,2014,48(10):1899-1903.
4 Liu M,Dai X L,Yin C X,et al.Preliminary design of a femtosecond timing system for large accelerator facilities[J].Nuclear Science and Techniques,2018,29(3):32.DOI:10.1007/s41365-018-0369-1.
5 Zhang W Y,Liu X Q,Feng L,et al.2.856 GHz microwave signal extraction from mode-locked Erfiber lasers with sub-100 femtosecond timing jitter[J].Nuclear Science and Techniques,2018,29(6):91.DOI:10.1007/s41365-018-0419-8.
6李刚,赵籍九,陈伯飞,等.BEPCⅡ储存环真空控制系统[J].原子能科学技术,2010,44(4):504-507.LI Gang,ZHAO Jijiu,CHEN Bofei,et al.Vacuum control system of BEPC II storage ring[J].Atomic Energy Science and Technology,2010,44(4):504-507.
7刘鸣,殷重先,赵黎颖,等.新型定时系统设计[J].核技术,2010,33(6):425-428.LIU Ming,YIN Chongxian,ZHAO Liying,et al.Design of a novel timing system[J].Nuclear Techniques,2010,33(4):425-428.
8邵娟.基于SCPI协议的可编程直流电源设计[D].苏州:苏州大学,2016.SHAO Juan.Design of a programmable DC power supply system based on SCPI[D].Suzhou:Soochow University,2016.
9 EPICS Stream Device User's Guide[EB/OL].2016-07[2018-11].http://epics.web.psi.ch/software/streamdevice/doc/.
10 Wang J G,Liu X Q,Feng L,et al.Analysis of electrooptical intensity modulator for bunch arrival-time monitor at SXFEL[J].Nuclear Science and Techniques,2019,30(1):3.DOI:10.1007/s41365-018-0524-8.