使用 MCNP6 模拟好奇号火星车 RAD 探测器中的银河宇宙射线谱。
Simulation of the GCR spectrum in the Mars curiosity rover's RAD detector using MCNP6.
机构信息
University of Tennessee, Department of Nuclear Engineering, Pasqua Nuclear Engineering Building, 1004 Estabrook Road, U.S.A. Knoxville, TN 37996.
University of Tennessee, Department of Nuclear Engineering, Pasqua Nuclear Engineering Building, 1004 Estabrook Road, U.S.A. Knoxville, TN 37996.
出版信息
Life Sci Space Res (Amst). 2017 Aug;14:43-50. doi: 10.1016/j.lssr.2017.07.003. Epub 2017 Jul 6.
The paper presents results from MCNP6 simulations of galactic cosmic ray (GCR) propagation down through the Martian atmosphere to the surface and comparison with RAD measurements made there. This effort is part of a collaborative modeling workshop for space radiation hosted by Southwest Research Institute (SwRI). All modeling teams were tasked with simulating the galactic cosmic ray (GCR) spectrum through the Martian atmosphere and the Radiation Assessment Detector (RAD) on-board the Curiosity rover. The detector had two separate particle acceptance angles, 4π and 30 ° off zenith. All ions with Z = 1 through Z = 28 were tracked in both scenarios while some additional secondary particles were only tracked in the 4π cases. The MCNP6 4π absorbed dose rate was 307.3 ± 1.3 µGy/day while RAD measured 233 µGy/day. Using the ICRP-60 dose equivalent conversion factors built into MCNP6, the simulated 4π dose equivalent rate was found to be 473.1 ± 2.4 µSv/day while RAD reported 710 µSv/day.
本文介绍了利用 MCNP6 对银河宇宙射线（GCR）在穿过火星大气层到达表面的过程进行模拟的结果，并与那里的 RAD 测量结果进行了比较。这项工作是西南研究所（SwRI）主办的空间辐射合作建模研讨会的一部分。所有建模团队都被要求模拟银河宇宙射线（GCR）通过火星大气层和好奇号探测器上的辐射评估探测器（RAD）的情况。该探测器有两个独立的粒子接收角，分别为 4π 和 30°偏离天顶。在两种情况下，所有 Z=1 到 Z=28 的离子都被追踪，而一些额外的次级粒子仅在 4π 情况下被追踪。MCNP6 的 4π 吸收剂量率为 307.3±1.3µGy/天，而 RAD 测量值为 233µGy/天。使用内置在 MCNP6 中的 ICRP-60 剂量当量转换因子，模拟的 4π 剂量当量率为 473.1±2.4µSv/天，而 RAD 报告的剂量当量率为 710µSv/天。
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