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Basic Study on Remote SIMS Method for Lunar Surface Observation

月面观测远程SIMS方法基础研究

基本信息

批准号：
15540412
负责人：
TANAKA Koji
金额：
$ 2.37万
依托单位：
Japan Aerospace Exploration Agency/Institute of Space and Astronautical Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540412/
关键词：
SIMS Ion Beam Mass Spectrometry 遠隔SIMS 氷探査 2次イオン分析質料分析

项目摘要

This report describes the results of basic study on the lunar surface observation using Remote SIMS (Secondary Ion Mass Spectrometry) method. Evidence of the water ice in permanently shadowed craters at the lunar poles was detected by Lunar Prospector's neutron spectrometer experiment. Because of the low spatial resolution and the uncertainty in indirect observations of the water ice, the direct exploration mission is expected. Remote SIMS is considered to be a candidate for the in-situ observation method on the moon in order to obtain a credible evidence of the ice occurrence. Irradiation of the lunar surface by the ion beams from the Lander will induce secondary and back scattered radiation. Generated secondary ions can be detected by a mass spectrometer installed on the Lander. We carried out the experiments of the secondary ion generation using a plate of the water ice and a porous alumina with the water attached on the cooling target that simulates the permanently shaded region of the lunar surface. Mass spectra of the water ice by the fast ion bombardment were measured. It was confirmed that secondary ion yield of the water ice under the various conditions of the primary ion beam. Our results showed a possibility of the observations of the volatiles such as water ice concerning the lunar surface by R-SIMS installed on the Lander.

本文介绍了利用远距离二次离子质谱仪(SIMS)对月球表面进行观测的基础研究结果。月球探测器的中子谱仪实验探测到了月球两极永久阴影陨石坑中存在水冰的证据。由于水冰间接观测的空间分辨率低和不确定性，直接探测任务是可望实现的。远程SIMS被认为是月球上原位观测方法的候选方法，以便获得有关冰层发生的可靠证据。来自着陆器的离子束照射月球表面会产生二次和后向散射辐射。产生的二次离子可以通过安装在着陆器上的质谱仪进行检测。我们利用一块水冰和多孔氧化铝进行了二次离子产生的实验，水附着在模拟月球表面永久阴影区域的冷却目标上。测量了快离子轰击水冰的质谱图。确定了不同一次离子束条件下水冰的二次离子产额。我们的结果表明，安装在着陆器上的R-SIMS有可能观测到月球表面的水冰等挥发性物质。