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在低地球轨道空间中对剂量计进行环境剂量等效的校准和模拟

Sukwon Youn¹, Uk-Won Nam², Sunghwan Kim³

¹Department of Applied Bioengineering and Research Institute for Convergence Science, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Korea.

Radiation protection dosimetry

|August 15, 2023

概括

这项研究对粒子剂量计 (PD) 进行了空间辐射校准. 在低地球轨道 (LEO) 中,通过使用混合辐射场来精确测量吸收剂量与环境剂量等价值 (H*(10)) .

科学领域:

太空科学太空科学
辐射检测辐射检测辐射检测

背景情况:

在低地球轨道 (LEO) 中的太空辐射对航天器和宇航员构成重大风险.
精确的剂量测量对于评估辐射暴露和确保任务安全至关重要.
颗粒剂量计 (PD) 是测量LEO辐射的重要有效载荷.

研究的目的:

校准颗粒剂量计 (PD) 以准确测量LEO混合辐射场中的吸收剂量.
为了确定低和高线性能量转移 (LET) 辐射的校准系数 (klow和khigh).
将吸收剂量转换为环境剂量等价物 (H*(10)) 用于辐射保护.

主要方法:

用137Cs源对PD进行辐射,以进行低LET校准.
在CERN-EU高能参考场的高能中子场中模拟PD响应,用于高LET校准.
与其他探测器 (Liulin) 进行测量和模拟校准因子的比较.

主要成果:

对PD的测量Klow显示了与其计算值的5.1%差异和与Liulin检测器的9.5%差异.
PD和Liulin之间的差异归因于影响Liulin探测器的非中子元件.
该研究成功地在混合辐射场中确定了PD的校准因子.

结论:

颗粒剂量计 (PD) 可以在LEO中进行校准,以准确地测量吸收剂量和环境剂量等效 (H*(10)) .
在没有直接源的情况下,模拟方法对于高LET校准是可行的.
了解混合场中的探测器响应对于可靠的空间剂量测量至关重要.

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