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Because a cleaning system of lunar dust on the solar panel and optical lens is of great importance for the lunar exploration, we are developing a self-cleaning device of lunar dust utilizing electrostatic force.[1]-[4] Although it has been demonstrated that particles can be transported by the traveling-wave electric field formed by the parallel electrodes, some specific issues must be overcome to utilize this system for the lunar exploration. In this study, we have developed the electrostatic cleaner system that can be used in the lunar environment. System Configuration: The developed cleaner system is shown in Fig. 1. The conveyer consists of transparent ITO electrodes printed on a glass substrate. The surface of the conveyer is covered with an insulating film to prevent from electrical breakdown between electrodes. Traveling-wave propagation was achieved utilizing a set of positive and negative amplifiers controlled by a microcomputer. Four-phase rectangular voltage was applied to electrodes because it was most efficient compared to the sine or triangular wave. The power system is designed simple, small, and lightweight for the space application. Lunar soil simulant FJS-1 (Shimiz Corp.) and JSC1A (PLANET LLC.) were used for experiments. Results and Discussion: The cleaning rate of more than 90% was realized with this system under conditions of 700 V voltage and less than 100 Hz frequency. The reduced transmission efficiency of light and the reduced generation efficiency of the solar cell after cleaning were both only several %. Figure 2 shows photograph of the demonstration. Although some fraction of large particles larger than 0.5 mm were not transported, they were cleaned by the application of

Electrostatic Cleaner of Lunar Dust on Solar Panel and Optical Lens