Purpose In order to realize the control of current closed loop in HEPS corrector power supply,a digital control board is designed.Methods The control board uses the latest FPGA to realize digital processing and uses t...Purpose In order to realize the control of current closed loop in HEPS corrector power supply,a digital control board is designed.Methods The control board uses the latest FPGA to realize digital processing and uses two different AD chips to realize current and voltage sampling,respectively.In order to achieve high-precision closed-loop control,an effective closed-loop control program is designed.Results The controller has been widely used in HEPS projects,and its control effect has been proved.Conclusions In order to realize control and reduce power cost,the controller is designed.The testing experiments show that the controller has excellent performance,reliable operation and low cost.展开更多
Purpose The High Energy Photon Source(HEPS)is a 6 GeV diffraction-limited storage ring light source being built in China.HEPS booster ramps the beam energy from 500 MeV to 6 GeV with a repetition rate of 1 Hz.For the ...Purpose The High Energy Photon Source(HEPS)is a 6 GeV diffraction-limited storage ring light source being built in China.HEPS booster ramps the beam energy from 500 MeV to 6 GeV with a repetition rate of 1 Hz.For the beam dynamics simulations,the consideration of the fringe field effects is not ignorable.Method To this end,several methods based on one-dimensional and three-dimensional magnetic fields are used to model the dipoles and quadrupoles of booster.Results and conclusion In this paper,we evaluate the impacts of magnetic fringe field effects of dipoles and quadrupoles on the optics of the HEPS booster.展开更多
Purpose As a fourth-generation light source,High Energy Photon Source(HEPS)has much more stringent requirements to the beam orbit stability in both horizontal and vertical directions than the previous sources due to t...Purpose As a fourth-generation light source,High Energy Photon Source(HEPS)has much more stringent requirements to the beam orbit stability in both horizontal and vertical directions than the previous sources due to the much smaller beam sizes.Methods A Fast Orbit FeedBack(FOFB)system,with the closed-loop bandwidth around 500 Hz,is needed to meet the critical requirements.The latency of the FOFB system is the key to achieve these requirements.Results Proper design and implementation of the feedback logic to have low latency is illustrated in the paper.Calculation accuracy is kept in the whole operation except for the last-minute data translation into 32-bit floating point number.展开更多
Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conduct...Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conducting 500 MeV linac,and three transport lines.As the beginning of HEPS,a stable linac is quite important,which needs a qualified waveguide distribution system to transmit microwave power from klystrons to accelerating structures.Methods Installation and high-power conditioning of the HEPS linac were performed from February to September 2022.The assembly and conditioning of the waveguide distribution system were completed in April and July,respectively.The design of the waveguide distribution system began in 2018 and was finalized at the end of 2020 after multiple iterations.Results Owing to careful design,fabrication,and assembly preparation,the assembly and conditioning of the system proceeded smoothly and considerable time was saved.Conclusion The entire process from the design to the ultimate realization of the system is introduced in detail in this paper.Satisfactory measurement results were obtained for some waveguide components.展开更多
文摘Purpose In order to realize the control of current closed loop in HEPS corrector power supply,a digital control board is designed.Methods The control board uses the latest FPGA to realize digital processing and uses two different AD chips to realize current and voltage sampling,respectively.In order to achieve high-precision closed-loop control,an effective closed-loop control program is designed.Results The controller has been widely used in HEPS projects,and its control effect has been proved.Conclusions In order to realize control and reduce power cost,the controller is designed.The testing experiments show that the controller has excellent performance,reliable operation and low cost.
基金The authors would like to thank their colleagues in the HEPS accelerator physics system for the fruitful suggestions and comments.This work is supported by High Energy Photon Source(HEPS)a major national science and technology infrastructure,National Natural Science Foundation of China(No.11922512,12275284)+1 种基金Youth Innovation Promotion Association of Chinese Academy of Sciences(No.Y201904)Key Laboratory of Particle Acceleration Physics and Technology,CAS(No.JSQ2021ZZ01).
文摘Purpose The High Energy Photon Source(HEPS)is a 6 GeV diffraction-limited storage ring light source being built in China.HEPS booster ramps the beam energy from 500 MeV to 6 GeV with a repetition rate of 1 Hz.For the beam dynamics simulations,the consideration of the fringe field effects is not ignorable.Method To this end,several methods based on one-dimensional and three-dimensional magnetic fields are used to model the dipoles and quadrupoles of booster.Results and conclusion In this paper,we evaluate the impacts of magnetic fringe field effects of dipoles and quadrupoles on the optics of the HEPS booster.
基金This work is supported by Youth Innovation Promotion Association(Y9291420K2).
文摘Purpose As a fourth-generation light source,High Energy Photon Source(HEPS)has much more stringent requirements to the beam orbit stability in both horizontal and vertical directions than the previous sources due to the much smaller beam sizes.Methods A Fast Orbit FeedBack(FOFB)system,with the closed-loop bandwidth around 500 Hz,is needed to meet the critical requirements.The latency of the FOFB system is the key to achieve these requirements.Results Proper design and implementation of the feedback logic to have low latency is illustrated in the paper.Calculation accuracy is kept in the whole operation except for the last-minute data translation into 32-bit floating point number.
基金Funded by Youth Innovation Promotion Association CAS(2020015)and the HEPS project.
文摘Purpose The High-Energy Photon Source(HEPS)is a 6 GeV storage ring-based light source under construction in Beijing,China.Its accelerator consists of a 6 GeV storage ring,a full-energy booster,an S-band normal-conducting 500 MeV linac,and three transport lines.As the beginning of HEPS,a stable linac is quite important,which needs a qualified waveguide distribution system to transmit microwave power from klystrons to accelerating structures.Methods Installation and high-power conditioning of the HEPS linac were performed from February to September 2022.The assembly and conditioning of the waveguide distribution system were completed in April and July,respectively.The design of the waveguide distribution system began in 2018 and was finalized at the end of 2020 after multiple iterations.Results Owing to careful design,fabrication,and assembly preparation,the assembly and conditioning of the system proceeded smoothly and considerable time was saved.Conclusion The entire process from the design to the ultimate realization of the system is introduced in detail in this paper.Satisfactory measurement results were obtained for some waveguide components.
