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Coupling measurement and correction at the SSRF storage ring

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 201-206页

作者： manzhou zhang (1) Jie Hou (1) HaoHu Li (1) 1. Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China

Brightness is an important parameter for 3rd generation light source. Correcting the emittance coupling is a realistic way to increase brightness without any additional equipment in a machine under operation. The main sources of emittance coupling are betatron coupling and vertical dispersion. At the SSRF storage ring, tune split and LOCO are used to measure the respective betatron and emittance coupling. Both of these sources can be corrected by skew quadrupoles. By measuring the skew quadrupole-coupling response matrix, betatron coupling can be changed from 0.014% to 2%. But the vertical dispersion changes at the same time. LOCO can find the suitable setting to correct simultaneously the betatron coupling and vertical dispersion. The emittance coupling can be reduced to 0.17% by this method. More simulations show the potential for smaller emittance coupling if more skew quadrupoles are employed.

关键词： emittance coupling betatron coupling vertical dispersion tune split LOCO

Calibration of the linear optics in the SSRF storage ring

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Nuclear Science and Techniques 2008年第5期19卷 257-265页

作者： TIAN Shunqiang LIU Guimin zhang Wenzhi LI Haohu zhang manzhou HOU Jie CHEN Guangling Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

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 *** 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) *** fitting the closed orbit response matrix,linear optics of the storage ring is substantially corrected,and the measured parameters agree well with the *** optics modes were commissioned,and relevant machine physics studies were carried *** results are summarized.

关键词：线性光学 SSRF聚能环同步加速器校准

Coupling measurement and correction at the SSRF storage ring

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Coupling measurement and correction at the SSRF storage ring

Tracking code simulation for passive harmonic cavity in the SSRF storage ring

第一届中国粒子加速器会议

作者： zhang manzhou HOU Jie LI HaoHu Shanghai Institute of Applied Physics Chinese Academy of Sciences

Brightness is an important parameter for 3 generation light *** the emittance coupling is a realistic way to increase brightness without any additional equipment in a machine under *** main sources of emittance coupling are betatron coupling and vertical *** the SSRF storage ring,tune split and LOCO are used to measure the respective betatron and emittance *** of these sources can be corrected by skew *** measuring the skew quadrupole-coupling response matrix,betatron coupling can be changed from 0.014%to 2%.But the vertical dispersion changes at the same *** can find the suitable setting to correct simultaneously the betatron coupling and vertical *** emittance coupling can be reduced to 0.17%by this *** simulations show the potential for smaller emittance coupling if more skew quadrupoles are employed.

关键词： emittance coupling betatron coupling vertical dispersion tune split LOCO

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Radiation Detection Technology and Methods 2018年第1期2卷 57-64页

作者： Thanapong Phimsen Bocheng Jiang Hongtao Hou Shunqiang Tian manzhou zhang Qinglei zhang Kun Wang Zhentang Zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesZhangjiang campusShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China ShanghaiTech University Shanghai 201210China

Background A passive third harmonic cavity is planned to install in the Shanghai Synchrotron Radiation Facility(SSRF)storage ring to increase the beam *** beam loading effect generated by the gap between the bunch trains can suppress the bunch lengthening effect of the third harmonic ***,the field excited in the passive operation of the harmonic cavity depends on the bunch *** To estimate the effect of transient beam loading,the tracking codes have been *** The tracking simulation has been performed for three uniform filling cases and a nonuniform filling *** lengthened bunch distribution has also been included into tracking code *** effect of the lengthened bunch has also been *** The uniform filling pattern with shorter bunch trains shows lower transient beam loading effect and can give much higher bunch lengthening factors compared to those of non-uniform filling *** effect caused by the reduction of the harmonic voltage generated by lengthened bunch distribution causes a great reduction on bunch lengthening effect in uniform filling case,while the lengthening factor of non-uniform filling case does not affect much in this *** The tracking codes have been developed to estimate the effect of transient beam loading for three uniform filling cases and a non-uniform filling *** larger gap in the filling pattern can cause the higher transient beam loading effect and lower bunch lengthening *** lengthened bunch distribution has also been included into tracking code *** effect of the lengthened bunch has also been *** more the bunch is lengthened,the greater reduction on bunch lengthening effect.

关键词： SSRF storage ring Transient beam loading

Bimetallic Pd-Ni core-shell nanoparticles catalysts for the Suzuki reaction

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Nano Research 2014年第9期7卷 1337-1343页

作者： Ji Xiang Peng Li Hanbao Chong Li Feng Fangyu Fu Zhuang Wang Shilin zhang manzhou Zhu School of Chemistry and Chemical Engineering Anhui University Hefei 230601 China

A simple and efficient solution-based method for the synthesis of Pd-Ni bimetallic nanoparticles （NPs） has been developed. A series of Pd-Ni bimetallic NPs were readily achieved by reduction of PdC12 and Ni（acac）2 （acac = acetyl- acetonate） in the presence of oleylamine （OAm）, oleic acid （OA） and benzyl alcohol. Furthermore, by using high-resolution transmission electron microscopy （HRTEM）, energy-dispersive spectrometry （EDS） mapping and X-ray diffraction （XRD）, we demonstrate that the as-prepared Pd-Ni bimetallic NPs have core-shell structures with a Pd-rich core and a Ni-rich shell. In addition, the as-obtained Pd-Ni bimetallic NPs with varying compositions show excellent catalytic activities in the Miyaura-Suzuki reaction. When the nickel molar percentage was 0.23 to 0.65, the conversion with the as-obtained Pd-Ni bimetallic catalysts was above 90%. It is believed that this strategy can be employed to produce a variety of other well-defined core-shell type multimetallic nanostructures.

关键词： Pd Ni bimetallic NPs catalytic activities

Technical commissioning of the spot scanning system in Shanghai Proton Therapy Facility

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Radiation Detection Technology and Methods 2020年第1期4卷 46-55页

作者： Ming Liu Haiyang zhang Hang Shu Chongxian Yin Liying Zhao Lianhua Ouyang Rui Li Songqing Tan Zhishan Wang Hanwen Du Haiqun zhang manzhou zhang Kecheng Chu Xiaolei Dai Shanghai Institute of Applied Physics Chinese Academy of Sciences2019 Jialuo RoadShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesNo.99 Haike RoadZhangjiang Hi-Tech ParkPudongShanghai 201210China Shanghai APACTRON Particle Equipment Co.Ltd. 2019 Jialuo RoadShanghaiChina

Background In the field of particle therapy,the method of pencil beam scanning is of great potential for clinical application,now and in the *** The authors made strong effort to develop a spot scanning system for Shanghai Proton Therapy *** parameters and basic layout of the system are *** Functionalities and specifications of crucial devices are described in *** of the devices in the system were designed in house by the authors themselves,including scanning nozzle,scanning magnets and their power supplies,beam monitors,irradiation control modules and safety interlock *** the technical commissioning stage in the fix beam room,the spot scanning system was tested and *** Under conditions of the maximum dose rate and minimum dose rate,a)repeatability of the single spot dose is less than±0.1%;b)nonlinearity of the single spot dose is less than±0.1%;c)FWHM for spot size in air at isocenter varies from 8mm to 12mm for full energy,consistent with the design values;d)lateral dose distribution achieves a flatness of less than 2%for multiple proton *** According to the results of technical commissioning,the spot scanning system is capable of producing a pre-scribed 3D dose distribution for target tumor successfully.

关键词： Particle therapy Pencil beam scanning Commissioning

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上海质子医疗装置的涡流效应

强激光与粒子束 2011年第5期23卷 1357-1360页

作者：张满洲李浩虎李德明中国科学院上海应用物理研究所上海201204

涡流效应是较快重复频率加速器必须考虑的问题。涡流效应引入的六极、四极、二极分量,以及发热效应都会对环的参数如色品、工作点、共振、能量漂移等产生影响。通过计算引入不同效应的强度,模拟了各种效应对环参数的影响,并针对不同升... 详细信息

涡流效应是较快重复频率加速器必须考虑的问题。涡流效应引入的六极、四极、二极分量,以及发热效应都会对环的参数如色品、工作点、共振、能量漂移等产生影响。通过计算引入不同效应的强度,模拟了各种效应对环参数的影响,并针对不同升能曲线和升能频率引入涡流效应的计算和比较,得出了在目前考虑的频率范围内,对主环影响较大的效应为六极场,其它效应的影响需要较大的重复频率。并以此为依据选择了最终的工作曲线为半正弦,上升时间为0.7 s。

关键词：涡流六极场四极场二极场发热

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采油站工况巡检系统

石油钻采工艺 2000年第3期22卷 77-80页

作者：张志远柴满洲中原石油勘探局河南濮阳457001

采油站工况巡检系统是利用抽油机光杆载荷变化与电机功率对应关系原理 ,在站内测取抽油机电功率曲线 ,然后转换出等效示功图 ,将实测功率曲线与等效示功图相结合 ,综合分析判断电机、抽油机、抽油泵工作状况的连续实时监测系统。该系统... 详细信息

采油站工况巡检系统是利用抽油机光杆载荷变化与电机功率对应关系原理 ,在站内测取抽油机电功率曲线 ,然后转换出等效示功图 ,将实测功率曲线与等效示功图相结合 ,综合分析判断电机、抽油机、抽油泵工作状况的连续实时监测系统。该系统在站上获取示功图 ,可减少大量测试费用 ;对抽油杆断脱、停机、偷电等紧急故障及时报警 ,可提高生产时效 ;应用该系统后 ,又可开展抽油井抽空控制和信息网络化管理 ,提高油井管理水平。综述了实时检测系统的原理结构、功能及建立方法。

关键词：抽油井采油站工况巡检系统

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上海质子治疗装置束流输运系统物理设计

核技术 2011年第5期34卷 381-385页

作者：段雪非张满洲李浩虎中国科学院上海应用物理研究所上海201800 中国科学院研究生院北京100049

介绍上海质子治疗装置束流输运系统的设计。输运系统将主环引出的能量为70-250MeV的质子束送入不同治疗室,并实现所需的束斑形状。匹配主要考虑共振慢引出造成的相空间畸形和治疗计划对束流形态的要求,通过TRANSPORT程序进行匹配,得到... 详细信息

介绍上海质子治疗装置束流输运系统的设计。输运系统将主环引出的能量为70-250MeV的质子束送入不同治疗室,并实现所需的束斑形状。匹配主要考虑共振慢引出造成的相空间畸形和治疗计划对束流形态的要求,通过TRANSPORT程序进行匹配,得到了输运系统的磁聚焦结构和线性光学参数曲线图。通过模拟发现,该设计有较大的灵活性,能满足不同的束斑形态需求。

关键词：束流输运系统束流匹配磁聚焦结构线性光学参数