空间辐射地面模拟装置(SESRI)同步加速器注入设计和模拟研究
摘要
国家十二五工程将在哈尔滨工业大学建造一台空间辐射地面模拟装置（SESRI），该装置能够模拟空间辐照环境，对研究离子辐照材料、生命体等具有重要意义。SESRI主要由双ECR离子源，直线注入器，同步环和3个高能实验终端组成。周长为43.9 m的同步环作为装置的核心部分，能够向3个实验终端输送离子种类多、能量范围广的粒子束。为了保证环内有足够的粒子数，注入系统的设计至关重要，SESRI同步环采用多圈注入方案，并利用ACCSIM程序模拟粒子真实运动情况。结果表明，粒子的注入效率为85.5%，离子数增益可达17.1，可满足设计要求。 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 SESRI project dedicated to space radiation consists of two ECR ion sources, a high intensity ion linac, a synchrotron and 3 research terminals. As the key part of the complex, a 43.9 m synchrotron can provide broadest energy range and variable ion beam for each terminal. To obtain required intensity in the synchrotron, the injection system is significant. A multi-turn injection scheme is adopted in the synchrotron and the injection process is simulated by ACCSIM with multi-particle tracking method. The results show that the injection efficiency and intensity gain factor can reach 85.5% and 17.1 respectively. The multi-turn injection system can meet the design requirement.