The particle acceptance instead of the G-factors has been introduced for a particle telescope. The particle acceptance of a telescope module TEST is simulated by using the GEANT4 Monte-Carlo package. The results are p...The particle acceptance instead of the G-factors has been introduced for a particle telescope. The particle acceptance of a telescope module TEST is simulated by using the GEANT4 Monte-Carlo package. The results are presented and explained.展开更多
The SSC-linac （a new injector for the Separated Sector Cyclotron） is being designed in the HIRFL （Heavy Ion Research Facility in Lanzhou） system to accelerate 238U34＋ from 3.72 keV/u to 1.008 MeV/u. As a part of ...The SSC-linac （a new injector for the Separated Sector Cyclotron） is being designed in the HIRFL （Heavy Ion Research Facility in Lanzhou） system to accelerate 238U34＋ from 3.72 keV/u to 1.008 MeV/u. As a part of the SSC-linac injector, the HEBT （high energy beam transport） has been designed by using the TRACE-3D code and simulated by the 3D PIC （particle-in-cell） Track code. The total length of the HEBT is about 12 meters and a beam line of about 6 meters are shared with the exiting beam line of the HIRFL system. The simulation results show that the particles can be delivered efficiently in the HEBT and the particles at the exit of the HEBT well match the acceptance of the SSC for further acceleration. The dispersion is eliminated absolutely in the HEBT. The space-charge effect calculated by the Track code is inconspicuous. According to the simulation, more than 60 percent of the particles from the ion source can be transported into the acceptance of the SSC.展开更多
采用多粒子跟踪程序BEAMPATH对SSC-LINAC重离子RFQ直线加速器进行动力学模拟,分别对RFQ的接受度、高频特性、束流稳定性、空间电荷效应等进行了分析。该RFQ具有很大的纵向接受度,有利于束流在RFQ中的传输;高频特性研究表明,翼间电压设...采用多粒子跟踪程序BEAMPATH对SSC-LINAC重离子RFQ直线加速器进行动力学模拟,分别对RFQ的接受度、高频特性、束流稳定性、空间电荷效应等进行了分析。该RFQ具有很大的纵向接受度,有利于束流在RFQ中的传输;高频特性研究表明,翼间电压设定在理论值以上时,该RFQ都能保持较好的束流特性;束流稳定性分析结果表明,该RFQ具有很大的束流失配容忍度;空间电荷效应研究表明,当束流强度低于0.5 m A时,束流传输不受影响。综合研究结果表明,53.667 MHz重离子RFQ具有较好的动力学特性,满足SSC-LINAC直线加速器的设计要求。展开更多
基金Supported by Ministry of Science and Technology of China(2010CB833002)Innovative Program of the Chinese Academy of Sciences (KJCX2-YW-T16)
文摘The particle acceptance instead of the G-factors has been introduced for a particle telescope. The particle acceptance of a telescope module TEST is simulated by using the GEANT4 Monte-Carlo package. The results are presented and explained.
基金Supported by National Natural Science Foundation of China(10635090)
文摘The SSC-linac （a new injector for the Separated Sector Cyclotron） is being designed in the HIRFL （Heavy Ion Research Facility in Lanzhou） system to accelerate 238U34＋ from 3.72 keV/u to 1.008 MeV/u. As a part of the SSC-linac injector, the HEBT （high energy beam transport） has been designed by using the TRACE-3D code and simulated by the 3D PIC （particle-in-cell） Track code. The total length of the HEBT is about 12 meters and a beam line of about 6 meters are shared with the exiting beam line of the HIRFL system. The simulation results show that the particles can be delivered efficiently in the HEBT and the particles at the exit of the HEBT well match the acceptance of the SSC for further acceleration. The dispersion is eliminated absolutely in the HEBT. The space-charge effect calculated by the Track code is inconspicuous. According to the simulation, more than 60 percent of the particles from the ion source can be transported into the acceptance of the SSC.
文摘采用多粒子跟踪程序BEAMPATH对SSC-LINAC重离子RFQ直线加速器进行动力学模拟,分别对RFQ的接受度、高频特性、束流稳定性、空间电荷效应等进行了分析。该RFQ具有很大的纵向接受度,有利于束流在RFQ中的传输;高频特性研究表明,翼间电压设定在理论值以上时,该RFQ都能保持较好的束流特性;束流稳定性分析结果表明,该RFQ具有很大的束流失配容忍度;空间电荷效应研究表明,当束流强度低于0.5 m A时,束流传输不受影响。综合研究结果表明,53.667 MHz重离子RFQ具有较好的动力学特性,满足SSC-LINAC直线加速器的设计要求。
