The Calculation Method And Software Development Of The Absorbed Dose By Spatial High-Ener Electrons

Satellite and other spacecraft in orbit serving time will be affected by the radiation environment of the spatial high-energy charged particles, which will lead to the degradation of its exposed materials'properties, the anomalies or malfunctions of its electronic components, or even may ultimately result in the whole Star catastrophic accidents.The spatial high-energy electron irradiation is one of the main spatial particles environ-ments which Satellite and other spacecraft in orbit serving time encounters. The accurate calculation of the absorbed dose by the high energy electron irradiation is of great significance for the accurate prediction of satellites and other spacecrafts'reliability and life in orbit service. The calculation of the absorbed dose calculations, which involves spatial environmental science, nuclear physics and computational physics and other objects, is a rather complex issue.The calculation of the absorbed dose by the spatial high energy electron irradiation involves many issues. Particularly, the simulation of the electrons'transport in materials is the key of solving the issues and the point of difficulty. In this respect of the study at home and abroad, two methods is used: One is the set theory, the other is the Monte Carlo method. The set theory simulates by the way of solving the electron's transport equation, modeling. This method runs fast, but without careful consideration of the interaction between electron and material, and the error is large. However, the Monte Carlo method can just make up for this shortcoming, but the Monte Carlo method expends more computer resources, runs slowly. This paper will combine the Monte Carlo method with the idea of condensed history. On the one hand, it effectively plays the advantage of the Monte Carlo method in simulating the electron's transport, the other hand, by using the idea of the condensed history, it can greatly"compress"the electron's collision times in material, effectively saves the resources which the calculation consumes and substantially increases the calculation speed. Finally, by combining the spatial high-energy electron irradiation environment that the satellite and other spacecraft in orbit time encounters, the paper achieves the dose absorbed calculation of the spatial high energy electron radiation.To improve accuracy, a new sample method is adopted to achieve the sampling from the Moliere multiple scattering angle distribution. This method can not only effectively avoid sampling from the Moliere distribution directly, but also improve the efficency and accuracy of sampling.To meet the need of the project, a feasible and practical software for simulating and calculating is developed. The software has a modular design approach, a clear structure and facilitates integrating and debugging. The software has very good function, and can not only handle the problem of the spatial radiation, but also any radiation source. Meanwhile, the number of the layer is unrestricted, which make it facilitates handling the situation of the multiple layers. The software has very good graphical interaction function, and is easy to use. By comparison of the final results, conclusion can be got: At the same experimental conditions, software's results can be in good agreement with the results of the SHIELDOSE, which is a relatively approbatory software in the world ground.