When NASA sends humans to the moon for the first time in nearly 50 years as part of its Artemis Exploration Program, research conducted by a Missouri S&T Ph.D. student will help crew members understand the ways plasma and lunar surface dust interact.
David Lund, a third-year Ph.D. student in aerospace engineering at Missouri S&T, has received a NASA Space Technology Graduate Research Opportunity (NSTGRO) award to support his research.
“I am looking at the effect of lunar surface and dust grains that are electrically charged by solar wind particles and photoemissions and how this surface charge affects the safety of astronauts and equipment on the lunar surface,” Lund says. “This award from NASA will further my research.”
Lund says solar winds and photoemissions positively charge sunlit surfaces and negatively charge shadowed regions. This electrostatic environment creates a plasma region that charges dust grains and sends them aloft if the uplifting electric force on the dust grain is stronger than the downward gravitational force. Once aloft, charged dust grains may accumulate on astronauts’ spacesuits and equipment. Strong electrical fields may discharge and arc, seriously affecting activities on the lunar surface.
“David has made significant progress on this project,” says Dr. Daoru Han, assistant professor of mechanical and aerospace engineering and Lund’s Ph.D. advisor at Missouri S&T. “We just published an article about our high-fidelity numerical simulation tool, and we are truly excited to expand this research front in collaboration with NASA.”
In collaboration with the Electrostatics and Surface Physics Laboratory at NASA’s Kennedy Space Center, Lund will work to develop accurate and efficient computational models of the interactions between plasma and surface dust. The multiscale model ranges from microscopic charging to macroscopic transport of dust grains. Lund says previous efforts have focused on one scale or the other, but no current known model links the two scales together. Varying space and time scales of physics – from micrometer scale dust charging to meter scale dust transport – and sources of uncertainty like dust size and ambient plasma environment present challenges. Lund’s proposed research will address the challenges.
Lund will spend summers at Kennedy Space Center working with James R. Phillips III, his NASA mentor. The NSTGRO award includes a stipend, tuition allowance, faculty advisor allowance and on-site NASA Center experience allowance for the student. The award will also help Lund fulfill his career aspiration to work at NASA.
About Missouri University of Science and Technology
Missouri University of Science and Technology (Missouri S&T) is a STEM-focused research university of over 7,600 students and part of the four-campus University of Missouri System. Located in Rolla, Missouri, Missouri S&T offers 101 different degree programs in 40 areas of study and is ranked by CollegeFactual as the best public university to study engineering. For more information about Missouri S&T, visit www.mst.edu.