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Calibration of the linear optics in the SSRF storage ring 被引量:3
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作者 TIAN Shunqiang LIU Guimin +4 位作者 ZHANG Wenzhi LI Haohu ZHANG Manzhou HOU Jie CHEN Guangling 《Nuclear Science and Techniques》 SCIE CAS CSCD 2008年第5期257-265,共9页
PhaseⅠcommissioning of the SSRF storage ring at 3.0 GeV was ended with encouraging results. Distortions and calibrations of the linear optics during the storage ring commissioning are discussed in this paper.The cali... PhaseⅠcommissioning of the SSRF storage ring at 3.0 GeV was ended with encouraging results. Distortions and calibrations of the linear optics during the storage ring commissioning are discussed in this paper.The calibration procedure has reduced sextupole-additional focusing effects by minimizing closed orbit deviation and corrected quadrupole magnetic coefficients with the linear optics from closed orbit (LOCO) technique.After fitting the closed orbit response matrix,linear optics of the storage ring is substantially corrected,and the measured parameters agree well with the design.Four optics modes were commissioned,and relevant machine physics studies were carried out.Their results are summarized. 展开更多
关键词 线性光学 SSRF聚能环 同步加速器 校准
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A design strategy of achievable linear optics for a complex storage ring lattice 被引量:3
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作者 田顺强 《Chinese Physics C》 SCIE CAS CSCD 2010年第7期1009-1015,共7页
A design strategy is discussed in this paper,and it provides much convenience for effectively exploring achievable linear optics and globally investigating the flexibility of a complex lattice with super-periodicity.A... A design strategy is discussed in this paper,and it provides much convenience for effectively exploring achievable linear optics and globally investigating the flexibility of a complex lattice with super-periodicity.A matching method of fractional steps,which means separately finding the standard cell setting and the matching cell setting,is adopted to simplify the complexity of the linear beam optics design in the complex lattice.The multi-objective genetic algorithm is used to find most of all the stable linear optics,and reach a target solution after multi-generational propagation,both in the standard cell and the matching cell.A fitting algorithm with gradient information is used to restore the periodicity and symmetry of the lattice,and finely adjust the linear optics for further optimization.This design strategy is applied in the Shanghai Synchrotron Radiation Facility(SSRF) storage ring,and the results are presented. 展开更多
关键词 storage ring linear optics low-αc multbobjective genetic algorithm
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Linear optics calibration and nonlinear optimization during the commissioning of the SSRF storage ring 被引量:1
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作者 田顺强 张文志 +4 位作者 李浩虎 张满洲 后接 周雪梅 刘桂民 《Chinese Physics C》 SCIE CAS CSCD 2009年第S2期83-85,共3页
Phase I commissioning of the SSRF storage ring on 3.0 GeV beam energy was started at the end of December 2007. A lot of encouraging results have been obtained so far. In this paper, calibrations of the linear optics d... Phase I commissioning of the SSRF storage ring on 3.0 GeV beam energy was started at the end of December 2007. A lot of encouraging results have been obtained so far. In this paper, calibrations of the linear optics during the commissioning are discussed, and some measured results about the nonlinearity given. Calibration procedure emphasizes correcting quadrupole magnetic coefficients with the Linear Optics from Closed Orbit (LOCO) technique. After fitting the closed orbit response matrix, the linear optics of the four test modes is substantially corrected, and the measured physical parameters agree well with the designed ones. 展开更多
关键词 SSRF storage ring linear optics CALIBRATION NONlinearITY
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Towards the ultimate storage ring: The lattice design for Beijing Advanced Photon Source 被引量:5
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作者 徐刚 焦毅 《Chinese Physics C》 SCIE CAS CSCD 2013年第5期68-75,共8页
A storage ring-based light source, Beijing Advanced Photon Source (BAPS), is proposed to store a 5 GeV low-emittance electron beam and to provide high-brilliance coherent radiation. In this paper, we report our effo... A storage ring-based light source, Beijing Advanced Photon Source (BAPS), is proposed to store a 5 GeV low-emittance electron beam and to provide high-brilliance coherent radiation. In this paper, we report our efforts of pushing down the emittance of BAPS to approach the so-called ultimate storage ring, while fixing the circumference to about 1200 m. To help deal with the challenge of beam dynamics associated with the intrinsic, very strong nonlinearities in an ultralow-emittance ring, a linear optics design and nonlinear optimization, such combination of several progressive technologies is used in the as a modified theoretical minimum emittance cell with small- aperture magnets, quasi-3rd-order achromat, theoretical analyzer based on Lie Algebra and Hamiltonian analysis, multi-objective genetic algorithm and frequency map analysis. These technologies enable us to obtain satisfactory beam dynamics in one lattice design with natural emittance of 75 pro. 展开更多
关键词 ultimate storage ring EMITTANCE linear optics design nonlinear optimization
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Modification and optimization of the storage ring lattice of the High Energy Photon Source 被引量:11
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作者 Yi Jiao Fusan Chen +7 位作者 Ping He Chunhua Li Jingyi Li Qing Qin Huamin Qu Jinyu Wan Jiuqing Wang Gang Xu 《Radiation Detection Technology and Methods》 CSCD 2020年第4期415-424,共10页
Purpose For the High Energy Photon Source(HEPS),a green-field fourth-generation storage ring light source,the prelimi-nary design report(PDR)was completed in 2018,when the accelerator physics design had been basically... Purpose For the High Energy Photon Source(HEPS),a green-field fourth-generation storage ring light source,the prelimi-nary design report(PDR)was completed in 2018,when the accelerator physics design had been basically finished.During the subsequent hardware and engineering design of the HEPS storage ring based on the PDR design,a few problems and challenges emerged,calling for modifications of the lattice.Method In this paper,we will introduce the background and reasons for the modifications and present the linear optics and simulation results for the nonlinear performance of the modified lattice of the HEPS storage ring.Result and conclusion The modified lattice satisfies the requirements from hardware and engineering design. 展开更多
关键词 High Energy Photon Source Fourth-generation storage ring light source LATTICE linear optics Nonlinear performance
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Bunch transverse emittance increase in electron storage rings
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作者 高杰 《Chinese Physics C》 SCIE CAS CSCD 2009年第7期572-576,共5页
In this paper a theoretical framework to estimate the bunch transverse emittance growing in electron storage rings due to short range transverse wakefield of the machine is established. New equilibrium emittance equat... In this paper a theoretical framework to estimate the bunch transverse emittance growing in electron storage rings due to short range transverse wakefield of the machine is established. New equilibrium emittance equations are derived and applied to explain the experimentally obtained results in ATF damping ring. This equation will be useful for linear collider damping ring design. 展开更多
关键词 storage ring damping ring linear collider
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某型橡胶密封圈老化加速试验及寿命预测
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作者 崔昕晔 周源 常建 《装备环境工程》 CAS 2024年第10期87-93,共7页
目的通过开展高温老化试验及湿热老化试验,对某型硅橡胶O形密封圈的老化规律和贮存寿命进行探究,并创新性地将2类试验进行对比分析,进而更直观地分析不同应力因素对老化行为的影响以及不同模型的适用性。方法分别以温度单一应力和湿度... 目的通过开展高温老化试验及湿热老化试验,对某型硅橡胶O形密封圈的老化规律和贮存寿命进行探究,并创新性地将2类试验进行对比分析,进而更直观地分析不同应力因素对老化行为的影响以及不同模型的适用性。方法分别以温度单一应力和湿度双重应力为主要老化因素设计加速老化试验,以永久压缩变形率为退化数据求出不同应力下的橡胶性能退化模型,将2类老化试验分别与阿伦尼斯模型以及湿热模型相结合来预测密封圈的贮存寿命,并进一步探究单一应力和双重应力对老化过程具体影响,最后评估不同理论模型的适用性。结果求出了各应力下橡胶性能退化模型并预估出对应的密封圈贮存寿命,初步探究了温度、湿度及其综合作用对老化及贮存寿命的影响,分析了不同理论模型在实际应用中的准确性和适用性。结论通过两大类老化试验,对该型橡胶的贮存寿命作出了13.5和13.9年的预估,并得到温、湿度对橡胶老化影响较大,两者综合作用是非线性的结论。同时也分析出考虑湿热因素的模型更适合预测橡胶密封圈的老化寿命。 展开更多
关键词 硅橡胶 O型密封圈 贮存寿命 老化试验 阿伦尼斯模型 湿热老化 评估方法
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上海光源储存环主支撑减振研究(英文) 被引量:3
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作者 卜令山 赵振堂 +2 位作者 殷立新 杜涵文 严中保 《强激光与粒子束》 EI CAS CSCD 北大核心 2008年第1期127-130,共4页
上海光源是一台在建的第三代同步辐射光源,对束流轨道稳定性要求很高。由磁铁和支架组成的支撑组件的机械稳定性是影响束流轨道稳定性的重要因素。对主支撑组件样机的测试结果表明,其最低共振频率处放大倍数为50左右,超过要求5倍。因此... 上海光源是一台在建的第三代同步辐射光源,对束流轨道稳定性要求很高。由磁铁和支架组成的支撑组件的机械稳定性是影响束流轨道稳定性的重要因素。对主支撑组件样机的测试结果表明,其最低共振频率处放大倍数为50左右,超过要求5倍。因此,需要研究相应的减振措施。利用阻尼减振原理设计了一种约束阻尼结构。在样机上的测试结果表明,安装该装置后,支撑组件的共振放大倍数最大可以降低91.8%,对应的功率谱密度的峰值可以降低25 dB。因此,该装置可以用来增加支撑的稳定性。 展开更多
关键词 储存环 磁铁支架组件 振动 阻尼减振
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基于LOCO的上海光源储存环线性光学参数校正(英文) 被引量:2
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作者 张满洲 李浩虎 +3 位作者 陈建辉 田顺强 刘桂民 李德明 《强激光与粒子束》 EI CAS CSCD 北大核心 2009年第12期1893-1897,共5页
为了测量和校正线性光学参数,在上海光源储存环调束过程当中使用了基于响应矩阵的线性光学参数分析(LO-CO)的方法。介绍了应用LOCO进行计算和校正的过程,包括:数值模拟得到束流位置探测器的测量精度对拟合结果的影响,调整四极铁电源电... 为了测量和校正线性光学参数,在上海光源储存环调束过程当中使用了基于响应矩阵的线性光学参数分析(LO-CO)的方法。介绍了应用LOCO进行计算和校正的过程,包括:数值模拟得到束流位置探测器的测量精度对拟合结果的影响,调整四极铁电源电流强度来校正工作点和beta函数周期性的恢复。测量结果表明,在四极铁强度调整幅度在1.5%以内的情况下,储存环的束流光学参数成功地恢复到和设计值相当接近的状态,beta函数和色散函数畸变小于1%。通过束流光学参数的校正,使得在今后的工作当中可以轻松地控制储存环的工作模式。 展开更多
关键词 线性束流光学校正 线性光学参数分析 上海光源储存环
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抽水蓄能发电机组转子阻尼环连接片强度及寿命评估 被引量:1
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作者 牟玉壮 沈润杰 +2 位作者 王青华 黄建德 孙育哲 《中国工程机械学报》 北大核心 2016年第1期83-86,共4页
抽水蓄能发电机组转子中阻尼环连接片作为阻尼绕组的重要部件,在发电机组运行过程中受到离心力、电磁力等作用,极易发生疲劳开裂并刮伤定子绕组绝缘等严重事故.目前应用最广的转子阻尼环连接片有两种,分别为普通型阻尼环连接片和Ω型阻... 抽水蓄能发电机组转子中阻尼环连接片作为阻尼绕组的重要部件,在发电机组运行过程中受到离心力、电磁力等作用,极易发生疲劳开裂并刮伤定子绕组绝缘等严重事故.目前应用最广的转子阻尼环连接片有两种,分别为普通型阻尼环连接片和Ω型阻尼环连接片.通过有限元软件分析两种转子阻尼环连接片在不同工况下的应力应变,并计算了两种阻尼环连接片的安全系数.根据疲劳寿命评估方法,得到了两种转子阻尼环连接片的疲劳寿命,为阻尼环连接片的选型和制定连接片的维护及更换周期提供参考. 展开更多
关键词 抽水蓄能发电机组 转子 阻尼环连接片 寿命评估
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Studies on BEPC upgrade from pretzel to double-ring 被引量:1
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作者 ZHANG Chuang Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2010年第11期2084-2089,共6页
Physics opportunity in the charm and τ energy region calls for higher luminosity of the Beijing Electron-Positron Collider (BEPC).The BEPC has experienced continuous improvement since its completion in 1988.BEPCII,as... Physics opportunity in the charm and τ energy region calls for higher luminosity of the Beijing Electron-Positron Collider (BEPC).The BEPC has experienced continuous improvement since its completion in 1988.BEPCII,as a major upgrading project of the BEPC,aims at enhancing its luminosity of factor 30–100,following the principle of "one machine,two purposes" as adopted in BEPC,so that both high energy physics and synchrotron radiation experiments can be carried out with BEPCII.From the BEPC to BEPCII,the double-ring scheme with multi-bunch e +-e-collision in the large crossing angle was studied in comparison with the single-ring pretzel scheme.For the dedicated synchrotron radiation operation,artful "bridges" are designed to connect two halves of the outer ring in both the southern and the northern crossing regions.This paper reviews the studies on the BEPC upgrade from pretzel to double-ring structure of BEPCII. 展开更多
关键词 collider storage ring high energy PHYSICS SYNCHROTRON radiation
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通用飞行器地面电磁弹射工程系统研究 被引量:3
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作者 赵勇 《航空工程进展》 CSCD 2015年第3期387-394,共8页
通用飞行器地面电磁弹射可以提高飞行器起飞离地速度,增加飞行器有效载荷,节省起飞阶段能量消耗,延长飞行器飞行距离,降低飞行器动力装置起飞最大推力要求,缩短起飞距离。将"地下直线电机牵引地面交通车辆方法"作为飞行器地... 通用飞行器地面电磁弹射可以提高飞行器起飞离地速度,增加飞行器有效载荷,节省起飞阶段能量消耗,延长飞行器飞行距离,降低飞行器动力装置起飞最大推力要求,缩短起飞距离。将"地下直线电机牵引地面交通车辆方法"作为飞行器地面电磁弹射牵引方法,将"真空磁悬浮转动支撑结构无轴动能环储能高功率脉冲电源"作为电磁弹射的高功率脉冲电源,通过工程整体设计,为电磁弹射提供安全稳定的能量供给和多备份、高冗余度、高可靠性的高功率储能脉冲电源,实现安全、连续、可靠的通用飞行器地面直线电机电磁弹射工程系统。 展开更多
关键词 电磁弹射 直线电机 飞轮储能 动能环储能 脉冲电源
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从事高能物理研究的加速器 被引量:3
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作者 赵午 冯承天 《自然杂志》 1996年第1期1-9,共9页
本文简要地评述了从事高能物理研究的工具——粒子加速器,其中包括现存的加速器,也展望了将来的加速器.文章强调了这些加速器所面临的技术上的挑战.全文是将1995年8月5日至9日在汕头召开的第一届国际华人物理学大会上所作的讲演扩充写... 本文简要地评述了从事高能物理研究的工具——粒子加速器,其中包括现存的加速器,也展望了将来的加速器.文章强调了这些加速器所面临的技术上的挑战.全文是将1995年8月5日至9日在汕头召开的第一届国际华人物理学大会上所作的讲演扩充写成的. 展开更多
关键词 高能物理学 加速器 对撞机
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Design and Fabrication of the Magnets for BEPCⅡ Project
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作者 石才土 倪淦林 +12 位作者 孙献静 曹瓒 尹兆升 庞家标 陈宛 李藜 陈福三 彭全岭 尹宝贵 张卓 孙耀霖 王建力 张嘉菲 《Chinese Physics C》 SCIE CAS CSCD 北大核心 2008年第z1期7-10,共4页
The BEPCⅡis the upgrade project of the Beijing Electron Positron Collider(BEPC).According to the BEPCⅡdouble ring design scheme,a new ring will be added in the existing BEPC tunnel.The machine will provide electron ... The BEPCⅡis the upgrade project of the Beijing Electron Positron Collider(BEPC).According to the BEPCⅡdouble ring design scheme,a new ring will be added in the existing BEPC tunnel.The machine will provide electron and positron beams with an energy range from 1.0GeV to 2.1GeV for high energy physics research,and an electron beam of 2.SGeV,250mA for synchrotron radiation.So actually there are three storage rings for the BEPCⅡmachine.Due to the limited space of the existing BEPC tunnel and the requirement of high luminosity,the antechamber type vacuum chamber is used,that makes the BEPCⅡmagnets'design and fabrication very difficult.In the paper the general features of the design and fabrication of several kinds of main magnets for the BEPCⅡstorage ring and its interaction region are introduced.And the magnetic field measurement results are presented. 展开更多
关键词 electron positron collider storage ring conventional magnet magnetic field measurement
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国际直线对撞机的参数选择(英文) 被引量:1
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作者 高杰 《高能物理与核物理》 CSCD 北大核心 2006年第z1期156-158,共3页
给出了确定直线对撞机参数的一般程序,作为一个例子,给出了超低束团电量时的参数表.文章的主要目的是说明束流参数和对撞点以及阻尼环之间的相互制约关系.对于17km的阻尼环,它的能量被建议由5GeV升到7GeV.然而,对于6km的阻尼环能量为... 给出了确定直线对撞机参数的一般程序,作为一个例子,给出了超低束团电量时的参数表.文章的主要目的是说明束流参数和对撞点以及阻尼环之间的相互制约关系.对于17km的阻尼环,它的能量被建议由5GeV升到7GeV.然而,对于6km的阻尼环能量为5GeV是合理的. 展开更多
关键词 直线对撞机 ILC 总体参数选择 阻尼环
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光子对撞机研究进展 被引量:1
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作者 傅恩生 《激光与光电子学进展》 CSCD 2004年第2期24-29,共6页
简略评述以TESLA为基础的光子对撞机研究现状与进展。给出了光子对撞机基本方案,光子(γγ)对撞和光子-电子(γe)对撞所需的高能光子,可以用激光在高能电子束上的康普顿后向散射得到。当前,光子对撞机的关键问题是高能激光系统。... 简略评述以TESLA为基础的光子对撞机研究现状与进展。给出了光子对撞机基本方案,光子(γγ)对撞和光子-电子(γe)对撞所需的高能光子,可以用激光在高能电子束上的康普顿后向散射得到。当前,光子对撞机的关键问题是高能激光系统。以二极管抽运的高平均功率的同体激光系统,通过六次循环的光学储存环,可以提供波长1.06μm,脉冲能量5J,重复率-14kHz,脉冲间隔与电子束脉冲结构匹配的高功率激光,满足光子对撞机的要求。 展开更多
关键词 光子对撞机 正负电子对撞机 高功率激光 康普顿后向散射 光学储存环
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