Purpose The machine protection system(MPS)is an essential part of the BRing(Booster Ring)at the HIAF(High Intensity heavy ion Accelerator Facility)to protect the accelerator from possible accidents.The high accumulati...Purpose The machine protection system(MPS)is an essential part of the BRing(Booster Ring)at the HIAF(High Intensity heavy ion Accelerator Facility)to protect the accelerator from possible accidents.The high accumulation intensity and the complex operation mode of the BRing require MPS to respond quickly and operate stably.So,the detailed physical scheme of beam dump is proposed,and the corresponding simulation results are discussed in this paper.Method For this purpose,a multi-phased beam dump scheme based on the bipolar operation of fast extraction kicker magnets is proposed.The basic physical dimensions of the stoppers and energy deposited analysis have been calculated.Results and conclusion The multi-phased beam dump scheme is able to meet the engineering requirements,and the stopping efficiency can reach 100%for bunched beam.展开更多
Purpose The continuous-wave(CW)linear accelerator,SSC-Linac,has been put into operation successfully as the new injector of Separate Sector Cyclotron(SSC)for Heavy Ion Research Facility in Lanzhou(HIRFL).The SSC-Linac...Purpose The continuous-wave(CW)linear accelerator,SSC-Linac,has been put into operation successfully as the new injector of Separate Sector Cyclotron(SSC)for Heavy Ion Research Facility in Lanzhou(HIRFL).The SSC-Linac is operated at the frequency of 53.667 MHz,which is the four times of the SSC operating frequency.In order to improve the longitudinal capture efficiency and increase the beam current extracted from the SSC,an independent multi-harmonics buncher(MHB)operating at a fundamental frequency of 13.417 MHz had been designed and manufactured.Method This buncher adopts the dual-gap structure and sawtooth waveform is generated by multi-harmonics synthetized technology.Beam dynamics simulation with MHB was carried out and discussed in this paper.Furthermore,the beam commissioning using 84Kr14+had been performed on SSC-Linac.Results and conclusion The measured maximum capture efficiency 86.5%was obtained,which was well agreed with the simulation results.Due to the successful commissioning of MHB and the outstanding-performance of SSC-Linac,the extracted beam current from SSC has been improved one order of magnitude higher than before.展开更多
基金Thanks for the support from the National Key R&D Program of China(Grant NO.2019YFA0405400)National Natural Science Foundation of China(Grant No.11905268)the support from Guangdong Innovative and Entrepreneurial Research Team Program(Grant No.2016ZT06G373).
文摘Purpose The machine protection system(MPS)is an essential part of the BRing(Booster Ring)at the HIAF(High Intensity heavy ion Accelerator Facility)to protect the accelerator from possible accidents.The high accumulation intensity and the complex operation mode of the BRing require MPS to respond quickly and operate stably.So,the detailed physical scheme of beam dump is proposed,and the corresponding simulation results are discussed in this paper.Method For this purpose,a multi-phased beam dump scheme based on the bipolar operation of fast extraction kicker magnets is proposed.The basic physical dimensions of the stoppers and energy deposited analysis have been calculated.Results and conclusion The multi-phased beam dump scheme is able to meet the engineering requirements,and the stopping efficiency can reach 100%for bunched beam.
基金supported by the National Natural Science Foundation of China(No.11375243)Guangdong Innovative and Entrepreneurial Research Team Program(No.2016ZT06G373).
文摘Purpose The continuous-wave(CW)linear accelerator,SSC-Linac,has been put into operation successfully as the new injector of Separate Sector Cyclotron(SSC)for Heavy Ion Research Facility in Lanzhou(HIRFL).The SSC-Linac is operated at the frequency of 53.667 MHz,which is the four times of the SSC operating frequency.In order to improve the longitudinal capture efficiency and increase the beam current extracted from the SSC,an independent multi-harmonics buncher(MHB)operating at a fundamental frequency of 13.417 MHz had been designed and manufactured.Method This buncher adopts the dual-gap structure and sawtooth waveform is generated by multi-harmonics synthetized technology.Beam dynamics simulation with MHB was carried out and discussed in this paper.Furthermore,the beam commissioning using 84Kr14+had been performed on SSC-Linac.Results and conclusion The measured maximum capture efficiency 86.5%was obtained,which was well agreed with the simulation results.Due to the successful commissioning of MHB and the outstanding-performance of SSC-Linac,the extracted beam current from SSC has been improved one order of magnitude higher than before.
