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空間高能質(zhì)子對(duì)航天器材料損傷的仿真分析

The simulation analysis of high-energy proton damage to aluminum and polyethylene

  • 摘要: 近地空間是各種載人飛船、應(yīng)用衛(wèi)星、空間站的主要活動(dòng)區(qū)域,區(qū)域內(nèi)存在大量由地磁場(chǎng)捕獲的高能帶電粒子,嚴(yán)重影響航天器和航天員的安全。為此,需要對(duì)內(nèi)輻射帶低高度空間的高能帶電粒子環(huán)境及其通量分布進(jìn)行研究。如何對(duì)質(zhì)子進(jìn)行有效屏蔽對(duì)空間輻射防護(hù)有重要的研究意義。文章針對(duì)粒子在空間環(huán)境中的輻射,簡(jiǎn)要介紹了質(zhì)子在空間環(huán)境中的分布情況及在物質(zhì)中的傳輸問題。利用SRIM軟件模擬質(zhì)子在不同材料(鋁、聚乙烯)中輸運(yùn)過程。根據(jù)得到的射程與能量關(guān)系及對(duì)阻止本領(lǐng)的分析,從理論上提出航天器防護(hù)的合理方案。

     

    Abstract: Near-Earth space swarms with various application satellites, manned spacecraft, manned space laboratory. Large numbers of high-energy particles captured in the magnetic field seriously affect the safety of spacecraft, detection equipment and astronauts. So, it is necessary to study the high-energy charged particle flux distribution and the environment of a high degree of internal radiation and of low altitude. This paper studies particles in a space radiation environment, proton distribution in the space environment and the transmission in materials. Simulations are carried out using Geant4 packages for the transport process of proton in different materials (aluminum, polyethylene). According to the range and energy relations and the analysis of energy deposition, a program is proposed for protection of the spacecraft.

     

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