Radiation Dose of LND on the Lunar Surface in Two Years
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摘要: 月球表面的辐射剂量是影响航天员安全和月表驻留时间的重要参数,通过对月表的粒子辐射测量可以为航天员的辐射安全防护提供重要依据.利用嫦娥四号着陆器上搭载的月表中子与辐射剂量探测仪二年的观测数据得到:月表粒子辐射在硅中的平均总吸收剂量率为12.66±0.45μGy·h-1,中性粒子吸收剂量率为2.67±0.16μGy·h-1.辐射剂量率随时间出现缓慢的下降,LET谱的变化则很小.同时观测到了2020年12月太阳活动末期由于银河宇宙线福布斯下降导致的辐射剂量率降低.Abstract: The radiation dose on the lunar surface is an important parameter affecting the safety of astronauts and the residence time of the lunar surface. The measurement of the particle radiation on the lunar surface can provide an important basis for the radiation safety protection of astronauts. Based on the two-year observation data of lunar neutron and radiation dose detector on Chang'E-4 lander, the average total absorbed dose rate of lunar particle radiation in silicon is 12.66±0.45μGy·h-1, and the absorbed dose rate of neutral particle is 2.67±0.16μGy·h-1. The radiation dose rate decreases slowly with time, but the change of LET spectrum is very small. The decrease of radiation dose rate due to the decrease of fubusch of GCR at the end of solar activity in December 2020 was observed.
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Key words:
- Chang'E-4 /
- Lunar surface /
- Radiation dose /
- Astronaut
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[1] NASA. Space Radiation Cancer Risk Projections and Uncertainties-2012[R]. Houston: NASA, 2013 [2] STRAUBE U, BERGER T, REITZ G, et al. Operational radiation protection for astronauts and cosmonauts and correlated activities of ESA Medical Operations[J]. Acta Astronaut., 2010, 66:963-973 [3] CUCINOTTA F A, MANUEL F K, JONES J, et al. Space radiation and cataracts in astronauts[J]. Radiat. Res., 2001, 156:460-466 [4] CHANG P Y, CUCINOTTA F A, BJORNSTAD K A, et al. Harderian gland tumorigenesis: low-dose and LET response[J]. Radiat. Res., 2016, 185:449-460 [5] CUCINOTTA F A. Review of NASA approach to space radiation risk assessments for Marsexploration[J]. Health Phys., 2015, 108:131-142 [6] SIMPSON J A. Elemental and isotopic composition of the galactic cosmic rays[J]. Ann. Rev.Nucl. Part. Sci., 1983, 33:323-382 [7] REAMES D V. Particle acceleration at the sun and in the heliosphere[J]. Space Sci. Rev., 1999, 90:413-491 [8] BOYNTON, DROEGE G F, MITROFANOV I G. High spatial resolution studies of epithermal neutron emission from the lunar poles: constraints on hydrogen mobility[J]. J. Geophys. Res. Planet., 2015, 117(12):1991-2012 [9] JIA Yingzhuo, ZOU Yongliao, XUE Changbin, et al. Scientific objectives and payloads of Chang'E-4 missionormalsize[J]. Chin. J. Space Sci., 2018, 38(1):118-130(贾瑛卓, 邹永廖, 薛长斌, 等. 嫦娥四号任务科学目标和有效载荷配置[J]. 空间科学学报, 2018, 38(1):118-130) [10] ENGLISH R A, BENSOTZ R E, VERNON BUILEY J, et al. Apollo Experience Report-Protection against radiation, NASA Technical Note NASA TN D-7080[OL]. [1973-03-01]. https://ntrs.nassa.gov/archive/nasa/casi.ntrs.nasa.gov/19730010172.pdf [11] ZEITLIN C, NARICI L, RIOS R R, et al. Comparisons of high-linear energy transfer spectra on the ISS and in deep space[J]. Space Weather, 2019, 17:396-418 [12] WIMMER-SCHWEINGRUBER R F, YU J, BÖTTCHER S I, et al. The Lunar Lander Neutron and Dosimetry (LND) experiment on Chang'E-4[J]. Space Sci. Rev., 2020, 216:104 [13] HOU D, ZHANG S, YU J, et al. Removing the dose background from radio active sources from active dose rate measurements in the Lunar Lander Neutron & Dosimetry (LND) experiment on Chang'E-4[J]. J. Instrum., 2020, 15(1):P01023-P01032 [14] ZHANG S, WIMMER-SCHWEINGRUBER R F, YU J, et al. First measurements of the radiation dose on the lunar surface[J]. Sci. Adv., 2020, 6.DOI:10.1126/sciadv. aaz1334 [15] XU Zigong, GUO Jingnan, ROBERT F, et al. First solar energetic particles measured on the lunar far-side[J]. Astrophys. J. Lett., 2020, 902:30 [16] BHANDARI N. Chandrayaan-1: science goals[J]. J. Earth Syst. Sci., 2005, 114:701-709 [17] CHIN G, BRYLOW S, FOOTE M, et al. Lunar reconnaissance orbiter overview: the instrument suite and mission[J]. Space Sci. Rev., 2007, 129:391-419 [18] DACHEV T P, TOMOV B T, YU N, et al. An overview of RADOM results for earth and moon radiation environment on Chandrayaan-1 satellite[J]. Adv. Space Res., 2011, 48(5):779-791 [19] SPENCE H E. Crater science team: an overview of results from the Lunar Reconnaissance Orbiter (LRO) Cosmic Ray Telescope for the effects of Radiation (CRaTER)[C]//Annual Meeting of the Lunar Exploration Analysis Group. Washington: LPI, 2010
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