MULASSIS程序对卫星舱内辐射剂量的评估

Estimation of Radiation Dose inside the Satellite

本文简单介绍了MULASSIS程序(Multi-Layered Shielding Simulation Software)以及利用该程序进行卫星舱内辐射剂量评估的方法和优点;列举了一个具体实例,以地球同步轨道卫星GOES13的质子探测数据作为仿真入射源,对短时期内由质子导致的该轨道高度卫星舱内的辐射剂量进行了评估。与国内外常用的利用空间环境模型进行辐射剂量评估的方法不同,利用实测数据作为仿真入射源可以更好地反映短时期内空间环境扰动带来的辐射剂量的增长。仿真结果表明,地球同步轨道高度的质子对舱内辐射剂量贡献很小,且随着屏蔽的增加而减小;该方法能准确地对短时期内卫星舱内的辐射剂量进行评估,与其他研究结果相吻合。MULASSIS程序可作为卫星工程人员评估舱内辐射剂量的一种方便快捷的工具。

the method and advantage to estimate the radiation dose inside the satellite by using MULASSIS.An application example was then introduced;with the energetic protons data of GEO satellite GOES 13 taken as the source particles,radiation inside the satellite caused by protons was estimated.Compared with other methods which made the space environment models as the source particles,this method could better reflect the radiation increased by the space environment disturbance.The simulation results shows that protons in GEO make little contribution to the radiation dose inside the satellite,and radiation dose deduces by increasing thickness of the shield;the simulation results consist with the other study results which prove the correctness of this method.MULASSIS can be a convenient and efficient tool to estimate the radiation inside the satellite by the satellite engineer.