Beam position monitors(BPMs)are important to monitor the beam moving steadily.Keeping the beam's normal motion is an important mission for Shanghai Synchrotron Radiation Facility.Effective diagnostic analysis is a...Beam position monitors(BPMs)are important to monitor the beam moving steadily.Keeping the beam's normal motion is an important mission for Shanghai Synchrotron Radiation Facility.Effective diagnostic analysis is an important way to accomplish this task.This paper develops a new method based on clustering analysis to diagnose the healthy of BPMs with basic running data,i.e.,the β oscillation of X and Y directions and noise data.The analysis results showed that all beam position monitors(140 BPMs)can be classified into three groups:normal group,worse performance group,and fault group,respectively.In addition,the abnormal BPMs(including worse performance)could be marked.The new method showed its ability to handle faulty BPMs and it could instruct daily maintenance.On the other hand,it will be a useful supplement for data analysis in accelerator physics.展开更多
同步辐射光束位置稳定性对光束强度至关重要,直接会影响到实验数据的质量,因此需要在实验过程中对光束位置进行实时监测.在同步辐射光束线上一般会使用双丝型的光束位置监测器(beam position monitor,BPM)扫描光束,获得光束的截面分布,...同步辐射光束位置稳定性对光束强度至关重要,直接会影响到实验数据的质量,因此需要在实验过程中对光束位置进行实时监测.在同步辐射光束线上一般会使用双丝型的光束位置监测器(beam position monitor,BPM)扫描光束,获得光束的截面分布,同时在固定位置的双丝会对光束位置进行静态的实时监测.但是这种监测方式对于入射光束分布有特殊的要求,当光束较大地偏离原有位置时会对双丝BPM造成损伤的危险.北京同步辐射1W2B生物大分子实验站通过采用双丝型BPM实时动态跟踪监测方式,有效地解决了常规监测方式带来的光束分布和光敏丝损伤问题,为实验光束的稳定性研究提供了基础.展开更多
介绍了在北京同步辐射生物大分子线站1W2B上新建立的稳定性监测系统的结构和初步应用结果。该系统利用优化设计的双刀片型束流位置监视器(BPM,beam position monitor)和双丝型BPM,结合荧光靶、电离室、荧光探测器等装置,对实验期间光束...介绍了在北京同步辐射生物大分子线站1W2B上新建立的稳定性监测系统的结构和初步应用结果。该系统利用优化设计的双刀片型束流位置监视器(BPM,beam position monitor)和双丝型BPM,结合荧光靶、电离室、荧光探测器等装置,对实验期间光束线的前端区、束线段和样品处三个环节的同步光变化情况进行监测,并及时发现入射光不稳定的来源。另外,通过该系统还得到插入件内电子轨道的变化情况,为北京同步辐射装置建立轨道慢反馈调节系统提供了重要依据。展开更多
基金Ten Thousand Talent Program and Chinese Academy of Sciences Key Technology Talent Program (No.Y91G201B01)。
文摘Beam position monitors(BPMs)are important to monitor the beam moving steadily.Keeping the beam's normal motion is an important mission for Shanghai Synchrotron Radiation Facility.Effective diagnostic analysis is an important way to accomplish this task.This paper develops a new method based on clustering analysis to diagnose the healthy of BPMs with basic running data,i.e.,the β oscillation of X and Y directions and noise data.The analysis results showed that all beam position monitors(140 BPMs)can be classified into three groups:normal group,worse performance group,and fault group,respectively.In addition,the abnormal BPMs(including worse performance)could be marked.The new method showed its ability to handle faulty BPMs and it could instruct daily maintenance.On the other hand,it will be a useful supplement for data analysis in accelerator physics.
文摘同步辐射光束位置稳定性对光束强度至关重要,直接会影响到实验数据的质量,因此需要在实验过程中对光束位置进行实时监测.在同步辐射光束线上一般会使用双丝型的光束位置监测器(beam position monitor,BPM)扫描光束,获得光束的截面分布,同时在固定位置的双丝会对光束位置进行静态的实时监测.但是这种监测方式对于入射光束分布有特殊的要求,当光束较大地偏离原有位置时会对双丝BPM造成损伤的危险.北京同步辐射1W2B生物大分子实验站通过采用双丝型BPM实时动态跟踪监测方式,有效地解决了常规监测方式带来的光束分布和光敏丝损伤问题,为实验光束的稳定性研究提供了基础.
文摘介绍了在北京同步辐射生物大分子线站1W2B上新建立的稳定性监测系统的结构和初步应用结果。该系统利用优化设计的双刀片型束流位置监视器(BPM,beam position monitor)和双丝型BPM,结合荧光靶、电离室、荧光探测器等装置,对实验期间光束线的前端区、束线段和样品处三个环节的同步光变化情况进行监测,并及时发现入射光不稳定的来源。另外,通过该系统还得到插入件内电子轨道的变化情况,为北京同步辐射装置建立轨道慢反馈调节系统提供了重要依据。
