模拟火星辐射环境的GEANT4/AtRIS代码的实现和验证
Implementation and validation of the GEANT4/AtRIS code to model the radiation environment at Mars
摘要：
一个新的GEANT 4粒子传输模型-大气辐射相互作用模拟器（AtRIS，Banjac等人。杰·吉奥菲斯。Res.）- 是最近开发的，目的是模拟辐射与行星的相互作用。即将到来的系外行星科学的仪器进步，特别是像JWST和E-ELT这样的任务的凌日光谱能力，促使粒子传输代码的开发，重点是提供行星规格（大气和土壤几何形状和组成，潮汐锁定，海洋，云等）的必要灵活性。用于模拟系外行星的辐射环境。由于没有限制AtRIS在火星和金星上应用的因素，AtRIS独特的灵活性为新的研究提供了可能性。在成功验证地球测量Banjac et al. 2018，J. Geophys.结果：这项工作应用AtRIS与火星大气和风化层结构的具体实现来模拟火星的辐射环境。我们基准这些第一次建模结果的基础上不同的GEANT 4物理列表与高能粒子光谱最近测量的辐射评估探测器（RAD）在火星表面上。AtRIS与实际测量之间的良好一致性提供了AtRIS的第一个和声音验证之一，以及可以推荐用于预测具有类似于火星的大气环境的其他可能的（外）行星的辐射场的首选物理列表。
英文摘要：
A new GEANT4 particle transport model -- the Atmospheric Radiation Interaction Simulator (AtRIS, Banjac et al. 2018a. J. Geophys. Res.) -- has been recently developed in order to model the interaction of radiation with planets. The upcoming instrumentational advancements in the exoplanetary science, in particular transit spectroscopy capabilities of missions like JWST and E-ELT, have motivated the development of a particle transport code with a focus on providing the necessary flexibility in planet specification (atmosphere and soil geometry and composition, tidal locking, oceans, clouds, etc.) for the modeling of radiation environment for exoplanets. Since there are no factors limiting the applicability of AtRIS to Mars and Venus, AtRIS' unique flexibility opens possibilities for new studies. Following the successful validation against Earth measurements Banjac et al. 2018, J. Geophys. Res., this work applies AtRIS with a specific implementation of the Martian atmospheric and regolith structure to model the radiation environment at Mars. We benchmark these first modeling results based on different GEANT4 physics lists with the energetic particle spectra recently measured by the Radiation Assessment Detector (RAD) on the surface of Mars. The good agreement between AtRIS and the actual measurement provides one of the first and sound validations of AtRIS and the preferred physics list which could be recommended for predicting the radiation field of other conceivable (exo)planets with an atmospheric environment similar to Mars.
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