Space radiation dosimetry to evaluate the effect of polyethylene shielding in the Russian segment of the International Space Station.
Space radiation dosimetry to evaluate the effect of polyethylene shielding in the Russian segment of the International Space Station.
复制标题
空间辐射剂量测定，用于评估国际空间站俄罗斯部分聚乙烯屏蔽的效果。
DOI：
10.1016/j.phpro.2015.11.083
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tsuda S and Sato T
中科院分区：
文献类型：
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作者：
Nagamatsu A;Casolino M;Larsson O;Ito T;Yasuda N;Kitajo K;Shimada K;Takeda ;Tsuda S and Sato T
作为国际空间站（ALTCRISS）项目上Alteino长期宇宙射线测量的一部分，在国际空间站的俄罗斯部分使用覆盖或不覆盖聚乙烯屏蔽的主动和被动剂量计系统对聚乙烯的屏蔽效应进行了评价。对于被动剂量计系统，该项目使用了PADLES（空间生命科学和实验被动剂量计），它由一个热发光剂量计和一个连接在辐射器上的CR-39塑料核径迹探测器组成。为了研究CR-39 PNTD是否可以作为组织等效材料的替代物应用于空间剂量学中，我们不仅采用CR-39 PNTD本身作为辐射源，而且还采用了组织等效材料NAN-JAERI作为辐射源。用CR-39 PNTD和NAN-JAERI辐射器的PADLES测量的剂量之间的一致性相当令人满意，表明即使CR-39 PNTD不是完美的组织等效材料，也可以用常规PADLES测量组织等效剂量。结果发现，PE的屏蔽效果随航天器内的位置而变化：随着壁的平均厚度的增加，屏蔽效果变得不那么显著。这一趋势也得到了使用PHITS程序的Monte Carlo模拟的验证。在整个飞行实验中，在一系列的ALTCRISS项目的四个阶段，从2005年12月至2007年10月，我们评估了PE降低低地球轨道（LEO）辐射剂量的能力。
As a part of the Alteino Long Term Cosmic Ray measurements on board the International Space Station (ALTCRISS) project, the shielding effect of polyethylene (PE) were evaluated in the Russian segment of the ISS, using active and passive dosimeter systems covered with or without PE shielding. For the passive dosimeter system, PADLES (Passive Dosimeter for Life-Science and Experiments in Space) was used in the project, which consists of a Thermo-Luminescent Dosimeters (TLD) and CR-39 Plastic Nuclear Track Detectors (PNTDs) attached to a radiator. Not only CR-39 PNTD itself but also a tissue equivalent material, NAN-JAERI, were employed as the radiator in order to investigate whether CR-39 PNTD can be used as a surrogate of tissue equivalent material in space dosimetry or not. The agreements between the doses measured by PADLES with CR-39 PNTD and NAN-JAERI radiators were quite satisfactorily, indicating the tissue-equivalent dose can be measured by conventional PADLES even though CR-39 PNTD is not perfect tissue-equivalent material. It was found that the shielding effect of PE varies with location inside the spacecraft: it became less significant with an increase of the mean thickness of the wall. This tendency was also verified by Monte Carlo simulation using the PHITS code. Throughout the flight experiments, in a series of four phases in the ALTCRISS project from December 2005 to October 2007, we assessed the ability of PE to decrease radiation doses in Low Earth Orbit(LEO).