Unveiling charging and particle behavior of Chang'e-5 Lunar samples in electric field

Sydney, Australia (SPX) Sep 30, 2024
A significant study published in 'Engineering' has revealed new insights into the behavior of lunar regolith particles when exposed to an external electric field. This discovery has potential implications for space exploration and the utilization of lunar resources. Conducted by a team of scientists from the Qian Xuesen Laboratory of Space Technology, Tsinghua University, and other collaborating institutions, the research examines the charging properties and particle dynamics of lunar samples brought back by China's Chang'e-5 mission.

The research paper, titled "Charging Properties and Particle Dynamics of Chang'e-5 Lunar Sample in an External Electric Field," addresses the complexities involved in utilizing lunar regolith resources on-site. The study investigates how lunar particles can be manipulated using an external electric field, a technique with applications in dust removal, material transport, and mineral enrichment.

The experiments were carried out in high-vacuum conditions to simulate the lunar environment. Using regolith samples from the Chang'e-5 mission, researchers subjected the particles to an electric field generated by two parallel brass electrodes. They analyzed the charging process, particle movement, and the effects of these particles on aerospace materials.

Key Findings and Impact
The study revealed that lunar regolith particles behaved differently when charged under high-vacuum conditions compared to those in atmospheric conditions. Particles, ranging from 27.7 to 139.0 micrometers in diameter, were found to charge more negatively in the electric field. The research measured both the charge acquired by the samples and their charge-to-mass ratio, offering critical data for future lunar engineering applications.

Additionally, the study found considerable damage to target surfaces impacted by charged particles, highlighting the risks that lunar dust poses to aerospace materials. This information is essential for designing protective measures for spacecraft and lunar structures.

Contributions to Future Lunar Exploration
The research deepens our understanding of lunar regolith shielding and utilization, providing a solid basis for new techniques in in-situ resource use. Such techniques will be crucial for deep space exploration and establishing lunar bases.

This comprehensive analysis of the charging properties and dynamics of Chang'e-5 lunar samples under an external electric field fills a critical gap in experimental data. The findings not only expand our knowledge of lunar particle behavior but also inspire new strategies for managing lunar resources, supporting sustainable and efficient lunar exploration efforts.

Research Report:Charging Properties and Particle Dynamics of Chang'e-5 Lunar Sample in an External Electric Field