Accurate ground-based calibration for non-retrieval material erosion tests in various altitudes

该项目的目的是建立一种使用小型卫星进行非回收性材料测试的标准方法。 为此，一个低成本的空间合格的石英晶体微天平（QCM）系统应用于材料测试。 阐明了QCM系统在材料测试中的应用，同时指出了污染控制的重要性。 由于该QCM系统内部装有参考QCM晶体，因此可以抵消轨道上的温度变化。 与此相反，还观察到QCM系统的电磁兼容性不够，以致于原子氧测试过程中的激光诱导等离子体影响QCM的工作。 采用激光器和QCM的顺序工作可以解决这个问题。 本项目的PI首次在日本举办了国际会议（ISMSE-10 J），并启动了该研究领域的国际合作。

The purpose of this project is to establish a standard method of non-retrieval material test using small satellites. For this purpose, a low-cost space qualified quartz crystal microbalance (QCM) system was applied to the material tests. It was clarified that the QCM system could be appplied for materials test, however, the importance of contamination control was obvious in the same time. Since this QCM system equips reference QCM crystal inside, the temperature variation in the orbit could be cancelled. In contrast, it was also obsrved that the electromagnetic compatibility of the QCM system is not enough so that the laser-induced plasma during the atomic oxygen tests affect the QCM operation. This problem could be solved by using sequencial operation of the laser and QCM. The PI of this project conducted the international conference (ISMSE-10J), which is the first time in Japan, and activated international colaboration in this research area.