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Beam position monitor troubleshooting by using principal component analysis in Shanghai Synchrotron Radiation Facility

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Nuclear Science and Techniques 2014年第2期25卷 7-12页

作者：陈之初冷用斌袁任贤阎映炳赖龙伟 Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Chinese Academy of Sciences

Beam position monitors(BPMs)have been widely used in all kinds of measurement systems,feedback systems and other areas in particle accelerator field these *** malfunction of a single BPM can cause serious consequences such as the failure of the orbit feedback and the transverse feedback.A troubleshooting has been made to prevent the defective BPMs from affecting the accuracy and stability of the storage ring in Shanghai Synchrotron Radiation Facility(SSRF).Different types of malfunctions have been successfully identified by using the idea of principal component analysis(PCA).

关键词：上海同步辐射装置主成分分析法光位置检测器故障排除反馈系统粒子加速器 BPM 测量系统

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基于DeviceNet的设备级控制

核技术 2002年第8期25卷 561-566页

作者：冷用斌郑丽芳陆承蒙缪海峰刘松强沈国保中国科学院上海原子核研究所上海201800 中国科学技术大学合肥230026

预制研究中的上海同步辐射装置控制系统是一个基于Ethernet和DeviceNet现场总线的分布式系统 ,设备级控制是建立该系统的重点和难点之一。本文介绍采用DeviceNet接口的设备控制器的研制及其软硬件结构 ,并给出在磁铁电源控制中的应用实... 详细信息

预制研究中的上海同步辐射装置控制系统是一个基于Ethernet和DeviceNet现场总线的分布式系统 ,设备级控制是建立该系统的重点和难点之一。本文介绍采用DeviceNet接口的设备控制器的研制及其软硬件结构 ,并给出在磁铁电源控制中的应用实例。联机测试结果表明模拟量设定及回读精度优于 3× 10 - 5。

关键词：上海同步辐射装置控制系统 EPICS DeviceNet 设备控制器设计

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涡流板型切割磁铁半正弦波脉冲电源预制研究

核技术 2002年第8期25卷 578-584页

作者：傅禄欣韩谦康文中国科学院上海原子核研究所上海201800

预研中的上海同步辐射光源需要为其涡流板型切割磁铁提供幅度高达 10kA的半正弦波脉冲电流和相对较窄的脉冲宽度 (约 6 0 μs) ,并且光源需要此脉冲电源具有优良的性能 ,尤其是输出脉冲电流幅度稳定度和调节范围。为便于维护 ,将脉冲电... 详细信息

预研中的上海同步辐射光源需要为其涡流板型切割磁铁提供幅度高达 10kA的半正弦波脉冲电流和相对较窄的脉冲宽度 (约 6 0 μs) ,并且光源需要此脉冲电源具有优良的性能 ,尤其是输出脉冲电流幅度稳定度和调节范围。为便于维护 ,将脉冲电源置于电源厅内 ,经RG2 2 0 /U高频高压同轴电缆与切割磁铁相连。本文介绍该脉冲电源的设计和研制结果。

关键词：涡流板型切割磁铁半正弦波脉冲电源脉冲幅度稳定度分配门可控硅能量回收电路上海同步辐射装置

SSRF储存环注入薄切割磁铁样机的设计和研制

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高能物理与核物理 2002年第4期26卷 423-429页

作者：康文丁小平韩谦庞家标陈森玉中国科学院高能物理研究所北京100039 南京大学物理系南京210093

基于上海同步辐射装置 (SSRF)储存环注入系统的需要 ,在国内首次研制成功了一台涡流板型切割磁铁 ,其性能指标均达到设计要求 ,特别是漏场指标 ,达到了国际同类磁铁的先进水平 .本文对切割磁铁设计和研制的关键技术进行了讨论 ,对切割... 详细信息

基于上海同步辐射装置 (SSRF)储存环注入系统的需要 ,在国内首次研制成功了一台涡流板型切割磁铁 ,其性能指标均达到设计要求 ,特别是漏场指标 ,达到了国际同类磁铁的先进水平 .本文对切割磁铁设计和研制的关键技术进行了讨论 ,对切割磁铁的性能进行了测试。

关键词：涡流板型切割磁铁漏场主场上海同步辐射装置储存环注入系统设计 SSRF

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SSRF光子吸收器的研制

真空科学与技术 2002年第3期22卷 167-172页

作者：蒋迪奎陈丽萍殷立新国家上海同步辐射中心(筹) 上海201800

用于SSRF的水平和垂直两种光子吸收器已研制成功。光子吸收器既要吸收高功率负载和高功率密度的废弃的同步辐射 ,又要准直引出的光束 ,并受到严重的空间限制。设计仔细考虑了吸收器的结构形状、吸收面上同步辐射功率密度的稀释、吸收体... 详细信息

用于SSRF的水平和垂直两种光子吸收器已研制成功。光子吸收器既要吸收高功率负载和高功率密度的废弃的同步辐射 ,又要准直引出的光束 ,并受到严重的空间限制。设计仔细考虑了吸收器的结构形状、吸收面上同步辐射功率密度的稀释、吸收体和冷却水的热输运以及吸收体内的热应力及其寿命等问题。用经典热力学公式和ANSYS程序对吸收体进行了热计算。采用了数控机加工、电火花刻蚀加工、电子束焊接和几次钎焊等工艺。

关键词： SSRF 光子吸收器热输运制造工艺上海同步辐射装置储存环

Data-collection system for high-throughput X-ray absorption fine structure measurements

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Nuclear Science and Techniques 2016年第4期27卷 38-45页

作者： Rui-You Lu Qian Gao Song-Qi Gu Ya-Yun Yang Rui Si Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China University of Chinese Academy of Sciences Beijing 100049 China

A new X-ray absorption fine structure(XAFS)data-collection system based on the Experimental Physics and Industrial Control System software environment has been established at the BL14W1 beamline of the Shanghai Synchrotron Radiation Facility. The system provides for automatic sequential analysis of multiple samples for continuous high-throughput(HT) measurements. Specifically, 8 sample pellets are loaded into an alumina holder,and a high-precision two-dimensional translation stage is programmed to switch these samples automatically for collecting the XAFS spectrum of each sample in *** implement HT measurements via a graphical user interface developed with Control System ***, the successful operation of the HT XAFS system is demonstrated by running experiments on two groups of copper–ceria catalysts, each of which contains 8 different powder samples.

关键词： X射线吸收精细结构数据采集系统结构测量高通量上海同步辐射装置 XAFS谱测量与控制系统粉末样品

Research into the sampling methods of digital beam position measurement

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Nuclear Science and Techniques 2015年第3期26卷 71-76页

作者：邬维浩赵雷陈二雷刘树彬安琪 State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China

A fully digital beam position monitoring system(DBPM) has been designed for SSRF(Shanghai Synchrotron Radiation Facility). As analog-to-digital converter(ADC) is a crucial part in the DBPM system, the sampling methods should be studied to achieve optimum performance. Different sampling modes were used and compared through tests. Long term variation among four sampling channels, which would introduce errors in beam position measurement, is investigated. An interleaved distribution scheme was designed to address this issue. To evaluate the sampling methods, in-beam tests were conducted in SSRF. Test results indicate that with proper sampling methods, a turn-by-turn(TBT) position resolution better than 1 μm is achieved, and the slow-acquisition(SA) position resolution is improved from 4.28 μm to 0.17 μm.

关键词：采样方法位置测量数字波束上海同步辐射装置束流位置监测系统位置分辨率试验比较抽样方法

The XAFS beamline of SSRF

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Nuclear Science and Techniques 2015年第5期26卷 4-10页

作者：于海生魏向军李炯顾颂琦张硕汪丽华马静远李丽娜高倩司锐孙凡飞王宇宋飞徐洪杰余笑寒邹杨王建强姜政黄宇营 Shanghai Institute of Applied Physics Chinese Academy of Sciences

The BL14W1 beamline at Shanghai Synchrotron Radiation Facility(SSRF) is an X-ray absorption finestructure(XAFS) beamline, for investigating atomic local structure, which is demanded extensively in the fields of physics, chemistry, materials science, environmental science and so on. The beamline is based on a 38-pole wiggler with the maximum magnetic field of 1.2 T. X-rays of 4.5–40 ke V can be extracted by the optical scheme consisting of white beam vertical collimating mirror, liquid-nitrogen-cooled double crystal monochromator of Si(111) and Si(311), toroidal focusing mirror and higher harmonics rejection mirror. The maximum photon flux about 5 × 1012photons/s at the sample at 10 ke V, with a beam size of 0.3 mm × 0.3 mm. The beamline is equipped with four types of detectors for experiments in either transmission or fluorescence mode. At present,quick-XAFS, grazing incidence XAFS, X-ray emission spectroscopy, high-pressure XAFS and time-resolved X-ray excited optical luminescence methods have been developed.

关键词：上海同步辐射装置 XAFS 光束线 X射线吸收精细结构光源双晶单色器 X射线激发 SSRF

Low-alpha optics design for SSRF

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Nuclear Science and Techniques 2010年第3期21卷 134-140页

作者： WANG Xin TIAN Shunqiang LIU Guimin Shanghai Institute ofAppliedPhysics Chinese Academy of Scienee Shanghai 201800 China Graduate University of Chinese Academy of Science Beijing 100049 China

In this paper,short pulse radiation in Shanghai Synchrotron Radiation Facility(SSRF)is generated by the low momentum compaction factor(α_C)optics,and three kinds of the low-α_C optics are found,with the very lowα_C being adopted by reducing dispersion in the straight section to negative value in the *** acceptance is selected as objective functions in nonlinear optimization rather than the second orderα_C or other nonlinear driving *** optimal result is improved step-by-step by randomly setting harmonic sextupole *** optics modes,*** positiveα_C and low negativeα_C,are *** order to get a large energy acceptance and only one stable point in longitudinal phase space,the low negativeα_C optics is taken as an operation mode for the short pulse radiation in the SSRF.

关键词：上海同步辐射装置光学设计光源阿尔法二阶非线性动量压缩因子优化目标函数脉冲辐射