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12 June 2023 Laser particle sizer for lunar plume-surface interaction studies
Robert E. Peale, Dinidu Hathnagoda, Cameron Kelley, Chris J. Fredricksen, Christian Walker, Camilo Posada, Julia Zorovich, Coleman Cariker, Nagendra Dhakal, Javier Gonzalez, Pooria Golvari, Stephen M. Kuebler, Philip Metzger, Addie Dove
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Proceedings Volume 12537, Laser Radar Technology and Applications XXVIII; 125370A (2023) https://doi.org/10.1117/12.2663930
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
Surface dust blown by a lunar lander is a threat to operations and assets. Multi-national lunar exploitation makes this a potential defense problem. To aid prediction and protection, we are developing a lander-mounted laser-based instrument to obtain empirical particle-size distributions in ejecta plumes. The method is based on analysis of laser propagation decay at multiple wavelengths. System design depends on expected laser propagation decay lengths in the cloud of lunar particles lofted by the lander rockets. We present laboratory experiments to confirm theoretical expectations for laser propagation decay constants for independently known particle size distributions. The method of extracting particle size distributions from measured decay constants at multiple wavelengths is demonstrated. Predictions are made for decay constants in lunar plumes with representative regolith size distributions and minerology.
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Robert E. Peale, Dinidu Hathnagoda, Cameron Kelley, Chris J. Fredricksen, Christian Walker, Camilo Posada, Julia Zorovich, Coleman Cariker, Nagendra Dhakal, Javier Gonzalez, Pooria Golvari, Stephen M. Kuebler, Philip Metzger, and Addie Dove "Laser particle sizer for lunar plume-surface interaction studies", Proc. SPIE 12537, Laser Radar Technology and Applications XXVIII, 125370A (12 June 2023); https://doi.org/10.1117/12.2663930
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KEYWORDS
Particles
Laser beam propagation
Minerals
Refractive index
Laser scattering
Mie scattering
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