Injection Design And Simulation Study Of Synchrotron In SESRI

Space radiation ion can interact with aerospace material and organic life,which will trigger total dose,displacement damage,single particle event,aberrance effect of cell tissue and so on,and threaten the health of astronauts and the safety of spacecrafts.As a result,Space Environment Simulation and Research Infrastructure(SESRI),which is one of the large-scale scientific projects proposed in National Twelfth Five-Year Plan of China,will be constructed in Harbin Institution of Technology.The facility can simulate the space radiation environment and it plays a significant role in studying the interaction between the space radiation ion and material,organic life,etc.The huge project,including two ECR ion sources,a high intensity ion linac,a synchrotron and 3 research terminals,will provide an important research platform for space radiation and magnify the time of accelerator in China.The injection system of the synchrotron will be discussed in this thesis.To meet the demands of sufficient accumulated particles in the synchrotron,the injection system is quite essential.The theory of beam dynamics will be introduced.Some factors,which can influence the efficiency of the injection,will be explained.Moreover,compared with other injection methods,such as single turn injection,charge stripping injection,multi-turn injection is the only way for beam injection in SESRI.A program called ACCSIM will be improved to simulate the process of injection.Then the various injection parameters will be optimized.The simulation results show that the injection efficiency and intensity gain factor for C6+ beam can reach 85.5% and 17.1 respectively.For Bi32+ beam,they are 76.1% and 17.5 respectively.Therefore,the multi-turn injection system can fulfill the design requirement.