Abstract Aircraft crew are one of the groups of radiation workers which receive the highest annual exposure to ionizing radiation. Validation of computer codes used routinely for calculation of the exposure due to cosmic radiation and the observation of nonpredictable changes in the level of the exposure due to solar energetic particles, requires continuous measurements onboard aircraft. Appropriate calibration of suitable instruments is crucial, however, for the very complex atmospheric radiation field there is no single reference field covering all particles and energies involved. Further intercomparisons of measurements of different instruments under real flight conditions are therefore indispensable. In November 2017, the REFLECT (REsearch FLight of EURADOS and CRREAT) was carried out. With a payload comprising more than 20 different instruments, REFLECT represents the largest campaign of this type ever performed. The instruments flown included those already proven for routine dosimetry onboard aircraft such as the Liulin Si-diode spectrometer and tissue equivalent proportional counters, as well as newly developed detectors and instruments with the potential to be used for onboard aircraft measurements in the future. This flight enabled acquisition of dosimetric data under well-defined conditions onboard aircraft and comparison of new instruments with those routinely used. As expected, dosimeters routinely used for onboard aircraft dosimetry and for verification of calculated doses such as a tissue equivalent proportional counter or a silicon detector device like Liulin agreed reasonable with each other as well as with model calculations. Conventional neutron rem counters underestimated neutron ambient dose equivalent, while extended-range neutron rem counters provided results comparable to routinely used instruments. Although the responses of some instruments, not primarily intended for the use in a very complex mixed radiation field such as onboard aircraft, were as somehow expected to be different, the verification of their suitability was one of the objectives of the REFLECT. This campaign comprised a single short flight. For further testing of instruments, additional flights as well as comparison at appropriate reference fields are envisaged. The REFLECT provided valuable experience and feedback for validation of calculated aviation doses.

中文翻译：

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REFLECT – EURADOS 的研究飞行和 CRREAT 机载各种辐射剂量计的比对

摘要 机组人员是辐射工作人员中每年受到电离辐射照射量最高的群体之一。计算机代码的验证通常用于计算宇宙辐射引起的暴露量和观察太阳高能粒子引起的暴露水平的不可预测变化，需要在飞机上进行连续测量。合适仪器的适当校准是至关重要的，然而，对于非常复杂的大气辐射场，没有一个单一的参考场涵盖所涉及的所有粒子和能量。因此，在真实飞行条件下对不同仪器的测量结果进行进一步比对是必不可少的。2017年11月，进行了REFLECT（EURADOS和CRREAT的研究飞行）。REFLECT 的有效载荷包括 20 多种不同的仪器，是有史以来规模最大的此类活动。飞行的仪器包括那些已经被证明可用于常规机载剂量测定的仪器，如柳林硅二极管光谱仪和组织等效正比计数器，以及新开发的探测器和仪器，未来有可能用于机载测量。这次飞行能够在飞机上明确定义的条件下获取剂量学数据，并将新仪器与常规使用的仪器进行比较。正如预期的那样，常规用于机载飞机剂量测定和验证计算剂量的剂量计，例如组织等效正比计数器或像柳林这样的硅探测器装置，彼此之间以及模型计算都具有合理的一致性。传统的中子 rem 计数器低估了中子环境剂量当量，而扩展范围的中子 rem 计数器提供的结果与常规使用的仪器相当。尽管某些仪器的响应并非主要用于非常复杂的混合辐射场（例如机载飞机），但在某种程度上预计会有所不同，但验证其适用性是 REFLECT 的目标之一。该活动包括一次短途飞行。为了进一步测试仪器，预计将进行额外的飞行以及在适当的参考领域进行比较。REFLECT 为验证计算的航空剂量提供了宝贵的经验和反馈。