BEPCII has two rings each with an injection system. The injection system of each ring consists of two kicker magnets and a septum magnet. The injection layout of two rings is the same. Both two kickers would kick the ...BEPCII has two rings each with an injection system. The injection system of each ring consists of two kicker magnets and a septum magnet. The injection layout of two rings is the same. Both two kickers would kick the beam in horizontal plane. The betatron phase advance in the horizontal plane between two kickers is designed exactly 180° in order to reduce the perturbation to the circulating beams during injection. In fact, the residual orbit oscillation will originate because of the existence of a variety of errors. The Librea Electron BPM processor is used to acquire the beam position data in turn-by-turn mode and to analyze the residual orbit oscillation. According to the measurement results, minimization of the residual orbit oscillation can be done by adjusting the peak field strength and trigger timing delay of two kickers. With very small residual orbit oscillation the two beams can keep collision condition during the injection.展开更多
With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digi...With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digital BPM based on software radio and digital receiver,has gained first successful application in accelerator at SLS. The company of Instrumentation Technologies made many efforts to update this device and finally the family devices- Libera were formed.It integrates the analog RF front end electronics,A/D converter,digital signal processing and synchrony trigger into an all in one measurement system with wideband.The Libera can be used at different types of accelerators and it has the functions of first turn,turn by turn and COD measurement.It plays an important role in the BEPCⅡearly commissioning,especially in the beam circulating and stacking of BER and BPR,and also in the residual orbit oscillation measurement.In this paper,we introduce some measurement results by using the multifarious function of Libera,such as first turn,tune,residual orbit oscillation and optimum delay time of injection kicker.展开更多
The injection performance of the storage ring is one of the most important factors to consider at a synchrotron radiation facility, especially in the top-up mode. To evaluate the injection performance of the storage r...The injection performance of the storage ring is one of the most important factors to consider at a synchrotron radiation facility, especially in the top-up mode. To evaluate the injection performance of the storage ring at the Shanghai Synchrotron Radiation Facility, we have built a bunch-by-bunch position measuring system based on an oscilloscope Input/Output Controller. Accurate assessment of energy mismatching, distribution of residual oscillation, and angle error of injection kickers can be achieved by this system.展开更多
文摘BEPCII has two rings each with an injection system. The injection system of each ring consists of two kicker magnets and a septum magnet. The injection layout of two rings is the same. Both two kickers would kick the beam in horizontal plane. The betatron phase advance in the horizontal plane between two kickers is designed exactly 180° in order to reduce the perturbation to the circulating beams during injection. In fact, the residual orbit oscillation will originate because of the existence of a variety of errors. The Librea Electron BPM processor is used to acquire the beam position data in turn-by-turn mode and to analyze the residual orbit oscillation. According to the measurement results, minimization of the residual orbit oscillation can be done by adjusting the peak field strength and trigger timing delay of two kickers. With very small residual orbit oscillation the two beams can keep collision condition during the injection.
文摘With the developments of software radio technique,it not only revolutionizes the technique in modern communication field,but also brings about technical innovation on the beam instrumentation for accelerators.The digital BPM based on software radio and digital receiver,has gained first successful application in accelerator at SLS. The company of Instrumentation Technologies made many efforts to update this device and finally the family devices- Libera were formed.It integrates the analog RF front end electronics,A/D converter,digital signal processing and synchrony trigger into an all in one measurement system with wideband.The Libera can be used at different types of accelerators and it has the functions of first turn,turn by turn and COD measurement.It plays an important role in the BEPCⅡearly commissioning,especially in the beam circulating and stacking of BER and BPR,and also in the residual orbit oscillation measurement.In this paper,we introduce some measurement results by using the multifarious function of Libera,such as first turn,tune,residual orbit oscillation and optimum delay time of injection kicker.
基金Supported by National Natural Science Foundation of China(11375255)
文摘The injection performance of the storage ring is one of the most important factors to consider at a synchrotron radiation facility, especially in the top-up mode. To evaluate the injection performance of the storage ring at the Shanghai Synchrotron Radiation Facility, we have built a bunch-by-bunch position measuring system based on an oscilloscope Input/Output Controller. Accurate assessment of energy mismatching, distribution of residual oscillation, and angle error of injection kickers can be achieved by this system.
