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适用于同步辐射小角X射线散射的高压溶液装置及其应用

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高压物理学报 2025年第2期39卷 1-7页

作者：刘广峰李怡雯张建桥宋攀奇李娜中国科学院上海高等研究院国家蛋白质科学研究(上海)设施上海201204

高压作为一种重要的热力学变量,可用于引发软物质系统中的各种结构变化。小角X射线散射具有高空间分辨能力,可用于蛋白质折叠动力学、核酸结构稳定机制研究,在生命科学领域具有广阔的应用前景。然而,目前国内尚缺少用于高压溶液散射的... 详细信息

高压作为一种重要的热力学变量,可用于引发软物质系统中的各种结构变化。小角X射线散射具有高空间分辨能力,可用于蛋白质折叠动力学、核酸结构稳定机制研究,在生命科学领域具有广阔的应用前景。然而,目前国内尚缺少用于高压溶液散射的专用装置,为此,在上海光源BL19U2线站设计开发了一种专用于溶液X射线散射的高压原位样品装置和手动加压系统,实现了在0.1~250 MPa范围内静水压测量。该装置可实现X射线窗口在整个测量过程中保留在原位,有助于准确扣除背景散射,实现高信噪比测量,为食品科学、药理学、结构生物学等研究领域提供重要的研究平台。

关键词：上海同步辐射装置高压溶液散射装置小角X射线散射软物质

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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

Observation of cavitation and water-refilling processes in plants with X-ray phase contrast microscopy

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Nuclear Science and Techniques 2013年第6期24卷 1-6页

作者： XUE Yanling XIAO Tiqiao DU Guoha TONG Yajun LIU Huiqiang DENG Biao XIE Honglan XU Hongjie Shanghai Institute of Applied Physics Chinese Academy of SciencesZhangjiang Campus

With the spatial coherence of X-rays and high flux and brightness of the 3rd generation synchrotron radiation facility,X-ray phase contrast microscopy(XPCM)at Shanghai Synchrotron Radiation Facility(SSRF)can provide high resolution dynamic imaging of low electron density materials in *** this paper,we investigated the cavitation and water-refilling processes in rice and bamboo leaves utilizing XPCM at *** occurrence of xylem cavitation was recorded in *** study also revealed that under different dehydration conditions,cavitation occurs in different degrees,and therefore,the refilling process is *** results demonstrate that SSRF can provide high enough fluxes to study dynamic processes in plants in real-time,and XPCM is expected to be a promising method to reveal the mechanisms of cavitation and its repair in plants nondestructively.

关键词：相衬显微镜显微镜观察植物 X-射线填充过程气蚀上海同步辐射装置水稻

Latest advances of X-ray imaging and biomedical applications beamline at SSRF

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Nuclear Science and Techniques 2015年第2期26卷 6-21页

作者：谢红兰邓彪杜国浩付亚楠陈荣昌周光照任玉琦王玉丹薛艳玲彭冠云和友郭瀚肖体乔 Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied PhysicsChinese Academy of Sciences

On May 6, 2009, the X-ray imaging and biomedical application beamline(BL13W1) at Shanghai Synchrotron Radiation Facility(SSRF) officially opened to users, with 8–72.5 ke V X-rays. The experimental station is equipped with four sets of X-ray CCD detectors of different pixel size(0.19–24 μm) for on-line phase-contrast imaging and micro-CT imaging with 0.8 μm spatial resolution and 1 ms temporal resolution. An in vivo microCT experiment for a living insect was realized in 4 s. An X-ray fluorescence detector is equipped for X-ray fluorescence mapping imaging and X-ray fluorescence micro-CT imaging with 50 μm spatial resolution. In order to meet different requirements from the users, several experimental methods, such as X-ray spiral micro-CT, Xray local micro-CT, X-ray fast micro-CT, X-ray grating-based differential micro-CT, X-ray fluorescence microCT and X-ray quantitative micro-CT have been developed, and nearly 60 papers related to those developments for this beamline have been published. Moreover, the beamline has realized the remote fast CT reconstruction,providing a great convenience for the users to process experimental data at their offices. As of August 2014,the beamline has offered the user beamtime of(23 145 h), from which 232 user papers have been published,including 151 SCI papers and 55 papers with SCI impact factor > 3. The quantity and quality of the user paper outcome keep a steady increase. Some typical user experimental results are introduced.

关键词： X射线成像生物医学应用 SSRF 光束线上海同步辐射装置空间分辨率荧光检测器显微CT

Multi-bunch injection for SSRF storage ring

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Nuclear Science and Techniques 2015年第5期26卷 1-3页

作者：姜伯承林国强汪宝亮张满洲殷重先阎映炳田顺强王坤 Shanghai Institute of Applied Physics Chinese Academy of Sciences

The multi-bunch injection adopted at Shanghai Synchrotron Radiation Facility(SSRF) increases the injection rate greatly, with much less injection time than that of single bunch injection. It reduces massively the beam failure time during users' operation and prolongs the pulsed injection hardware lifetime. In this paper, the scheme to produce multi bunches for the RF electron gun is described. The filling result and beam orbit stability for top up operation is discussed.

关键词： SSRF 储存环上海同步辐射装置操作过程束流稳定性注射时间故障时间脉冲注入

Dose rate distribution of photoneutrons in an ID beamline of SSRF: simulations and measurements

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Nuclear Science and Techniques 2014年第5期25卷 1-5页

作者：徐加强夏晓彬盛尹祥子沈卫祖许浔江 Shanghai Institute of Applied Physics Chinese Academy of Sciences

Photoneutrons, emitted by means of photonuclear interactions when gas bremsstrahlung interacts with beamline components, can be another potential radiation source needed to be considered for shielding design and dose assessment of beamline. In this paper, simulations and measurements of photoneutrons dose rate at beamline BL09 U are carried out when Shanghai Synchrotron Radiation Facility(SSRF) running at Top-up mode(3.5 GeV, 235 mA). A geometry model is constructed for the beamline BL09 U with considerations of the scattering process of the major optical components. The model is compiled into Monte Carlo simulation code FLUKA to calculate photoneutron dose distribution. Measurements of the photoneutrons dose rate were performed by using Environmental Neutron Monitor(ENM). Observation points were arranged uniformly along the inside and outside of the optical enclosure(OE) of BL09 U. The calculation results agree with experiments within the measurements uncertainties. It is verified that photoneutrons dose simulation is reliable. The simulation and measurement methods can be applied to evaluate the neutron dose level of other beamline stations, and provide references for the shielding design of the beamlines at SSRF in the near future.

关键词：中子测量 SSRF 剂量评估光束线仿真速度分布上海同步辐射装置蒙特卡罗模拟

Developments at SSRF in soft X-ray interference lithography

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Nuclear Science and Techniques 2015年第1期26卷 1-7页

作者：杨树敏王连升赵俊薛超凡刘海岗许子建吴衍青邰仁忠 Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai Synchrotron Radiation Facility

The soft X-ray interference lithography(XIL) branch beamline at Shanghai Synchrotron Radiation Facility(SSRF) is briefly introduced in this article. It is designed for obtaining 1D(line/space) and 2D(dot/hole)periodic nanostructures by using two or more coherent extreme ultraviolet(EUV) beams from an undulator source. A transmission-diffraction-grating type of interferometer is used at the end station. Initial results reveal high performance of the beamline, with 50 nm half-pitch 1D and 2D patterns from a single exposure area of400 μm× 400 μm. XIL is used in a growing number of areas, such as EUV resist test, surface enhanced Raman scattering(SERS) and color filter plasmonic devices. By using highly coherent EUV beam, broadband coherent diffractive imaging can be performed on the XIL beamline. Well reconstructed pinhole of φ20 μm has been realized.

关键词：上海同步辐射装置干涉光刻软X射线表面增强拉曼散射光源纳米结构光束线 SSRF

An embedded single-board computer for BPM of SSRF

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Nuclear Science and Techniques 2011年第4期22卷 193-199页

作者： CHEN Kai LIU Shubin YAN Han WU Weihao ZHAO Lei AN Qi LENG Yongbin YI Xing YAN Yingbing LAI Longwei Department of Modern Physics University of Science and Technology of China Hefei 230026 China State Key Laboratory of Particle Detection & Electronics Hefei 230026 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

An embedded single-board computer (SBC) system based on AT91RM9200 was designed for monitoring and controlling the digital beam position monitor system of Shanghai Synchrotron Radiation Facility (SSRF) through the Virtex-4 FPGA in the digital processing *** SBC transfers the configuration commands from the remote EPICS to the FPGA,and calculates the beam position *** interface between the FPGA and the SBC is the Static Memory Controller (SMC) with a peak transfer speed of up to 349 *** 100 Mb Ethernet is used for data transfer between the EPICS and SBC board,and a serial port serves as monitoring the status of the embedded *** results indicate that the SBC board functions well.

关键词：上海同步辐射装置单板计算机嵌入式系统 AT91RM9200 BPM 存储控制器光源 Virtex