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目的为估算载人航天无地磁屏蔽下特大太阳质子事件的辐射剂量,建立包括构造特大太阳质子事件能谱、人体模型和Monte Carlo输运程序的解决方案。方法建立航天器和人体屏蔽模型,编写的Monte Carlo程序计算用大于30 MeV质子注量归一化的1956年和1972年特大太阳质子事件所致的器官吸收剂量。结果根据程序计算得到了不同屏蔽厚度两种谱型的特大太阳质子事件主要器官吸收剂量,与前人研究结果相近。结论通过比较验证计算方案结果可靠,特大太阳质子事件会造成很大器官吸收剂量,是载人航天非常大的潜在辐射危险。
Aim To evaluate the radiation dose of extra-large solar proton event without man-made magnetic shield in manned spacecraft, a solution was proposed to construct energy spectrum, human body model and Monte Carlo transport program for extra large solar proton event. Methods The spacecraft and the human body shielding model were established. The Monte Carlo program was written to calculate the organ absorbed doses due to the extraordinary solar proton events of 1956 and 1972 normalized by the proton fluence greater than 30 MeV. Results According to the program, the absorbed dose of the main organs of the extra large solar proton event with two kinds of spectral patterns with different shielding thicknesses was obtained, which is similar to the previous studies. Conclusions Comparing and verifying the calculation results with reliable results, extra-large solar proton events can cause very large organs to absorb the dose, which is a very large potential radiation risk of manned space flight.