在多层多匝矩形截面螺线管轴向分量磁场解析表达式难以求得的情况下,利用单匝矩形线圈及单层多匝矩形截面螺线管轴向分量磁场的解析表达式,采用切片求和的方法,求得了可用于软件编程的矩形截面螺线管轴向分量磁场分布的表达式,并编写了...在多层多匝矩形截面螺线管轴向分量磁场解析表达式难以求得的情况下,利用单匝矩形线圈及单层多匝矩形截面螺线管轴向分量磁场的解析表达式,采用切片求和的方法,求得了可用于软件编程的矩形截面螺线管轴向分量磁场分布的表达式,并编写了相应的Matlab计算程序.最终,利用所编写的计算程序,对各类小型加速器中应用较多的束流轨道校正磁铁轴向分量磁场的分布进行了计算,并与三维静态电磁场计算软件CST EM Studio的模拟结果进行了对比,两者符合较好.展开更多
In this paper,the slow orbit feedback system of HLS,including the feedback principle,the hardware,the software and the main operation results,is briefly introduced.With the help of slow orbit feedback system,the verti...In this paper,the slow orbit feedback system of HLS,including the feedback principle,the hardware,the software and the main operation results,is briefly introduced.With the help of slow orbit feedback system,the vertical orbit stability of HLS is better than 30 microns,which meets the requirement of synchrotron radiation users and is comparable with the international advanced level of orbit stability in the same kind of machines.展开更多
The beam horizontal orbit at Hefei Light Source(HLS)was drifting all along while the storage ring was operating.To study this phenomenon,the displacement and the temperature variation of the BPM chamber were measured....The beam horizontal orbit at Hefei Light Source(HLS)was drifting all along while the storage ring was operating.To study this phenomenon,the displacement and the temperature variation of the BPM chamber were measured.By analyzing the measurement results,the main reason that explained the drifting phenomenon was found. The vacuum chamber following the dipole magnets was heated by the synchrotron light,which caused the increasing of the chamber surface temperature.The variation of the chamber temperature was the main reason why the BPM chamber held the horizontal displacement.To suppress the orbit drifting,a compensation method of BPM movement was proposed and its experimental results were given.展开更多
文摘在多层多匝矩形截面螺线管轴向分量磁场解析表达式难以求得的情况下,利用单匝矩形线圈及单层多匝矩形截面螺线管轴向分量磁场的解析表达式,采用切片求和的方法,求得了可用于软件编程的矩形截面螺线管轴向分量磁场分布的表达式,并编写了相应的Matlab计算程序.最终,利用所编写的计算程序,对各类小型加速器中应用较多的束流轨道校正磁铁轴向分量磁场的分布进行了计算,并与三维静态电磁场计算软件CST EM Studio的模拟结果进行了对比,两者符合较好.
文摘In this paper,the slow orbit feedback system of HLS,including the feedback principle,the hardware,the software and the main operation results,is briefly introduced.With the help of slow orbit feedback system,the vertical orbit stability of HLS is better than 30 microns,which meets the requirement of synchrotron radiation users and is comparable with the international advanced level of orbit stability in the same kind of machines.
文摘The beam horizontal orbit at Hefei Light Source(HLS)was drifting all along while the storage ring was operating.To study this phenomenon,the displacement and the temperature variation of the BPM chamber were measured.By analyzing the measurement results,the main reason that explained the drifting phenomenon was found. The vacuum chamber following the dipole magnets was heated by the synchrotron light,which caused the increasing of the chamber surface temperature.The variation of the chamber temperature was the main reason why the BPM chamber held the horizontal displacement.To suppress the orbit drifting,a compensation method of BPM movement was proposed and its experimental results were given.
