Measuring Cosmic-Ray Exposure in Aircraft Using Rcal-Time Personal Dosimeters
Measuring Cosmic-Ray Exposure in Aircraft Using Rcal-Time Personal Dosimeters
复制标题
使用实时个人剂量计测量飞机中的宇宙射线暴露
DOI：
10.1093/rpd/ncm214
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发表时间：
2012
影响因子：
1
通讯作者：
B.H.Bennett
中科院分区：
文献类型：
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作者：
M.Takada;T.Nunomiya;T.Ishikura;T.Nakamura;B.J.Lewis;L.G.I.Bennett;I.L.Getley;B.H.Bennett
相关关系已经发展到执行到机组人员辐射暴露的半经验预测代码（PCAIRE）中，以考虑基于运输代码计算的太阳调制和低空极端条件的影响。进一步采用NASA提出的改进的太阳调制模型，在太阳调制的边界相关性之间进行插值。考虑到新的ICRP-92辐射加权因子和不同可能的源宇宙辐射场的照射几何形状，本研究重新评估了适用于机组人员照射法律规定的PCAIRE计算（基于测量）的有效剂量与环境剂量当量的换算比率。利用蒙特卡罗n粒子扩展代码进行计算分析，进一步估计了由地球同步环境卫星实时监测的偶发太阳高能粒子事件可能导致的机组人员额外暴露。这些预测与在飞机上测量的环境剂量当量率进行了比较，并计算了在各种地面中子监测仪上观察到的剂量当量率数据。
Correlations have been developed for implementation into the semi-empirical Predictive Code for Aircrew Radiation Exposure (PCAIRE) to account for effects of extremum conditions of solar modulation and low altitude based on transport code calculations. An improved solar modulation model, as proposed by NASA, has been further adopted to interpolate between the bounding correlations for solar modulation. The conversion ratio of effective dose to ambient dose equivalent, as applied to the PCAIRE calculation (based on measurements) for the legal regulation of aircrew exposure, was re-evaluated in this work to take into consideration new ICRP-92 radiation-weighting factors and different possible irradiation geometries of the source cosmic-radiation field. A computational analysis with Monte Carlo N-Particle eXtended Code was further used to estimate additional aircrew exposure that may result from sporadic solar energetic particle events considering real-time monitoring by the Geosynchronous Operational Environmental Satellite. These predictions were compared with the ambient dose equivalent rates measured on-board an aircraft and to count rate data observed at various ground-level neutron monitors.