Laser Welding System and Integrated Real-Time Nondestructive Inspection

Develop an innovative, laser welding system with integrated real-time nondestructive inspection capability for performing high-quality welds on the lunar surface. The system shall enable autonomous or semi-autonomous joining of metallic structures for lunar habitat construction, infrastructure assembly, equipment fabrication, and repair operations in support of NASA's Artemis program. Background: NASA's Artemis program is establishing sustained human presence on the Moon, requiring robust capabilities for habitat construction, infrastructure development, and equipment repair directly on the lunar surface. The ability to weld and join metallic structures in the lunar environment is critical for assembling habitats, constructing power systems, fabricating equipment, repairing rovers and tools, and building infrastructure. Laser welding offers distinct advantages for lunar applications including precision, no consumable materials requirement, compatibility with automation, high-quality repeatable joints, and tolerance for dusty environments. Real-time nondestructive inspection is essential to verify weld quality without requiring extensive astronaut inspection time or impractical destructive testing on the lunar surface. Lunar Environment Challenges: The lunar surface presents extreme operational challenges. The environment includes high vacuum conditions, temperature cycling between +127 C in sunlight and -173 C in shadow, intense solar and cosmic radiation, and electrostatic charging. The lunar day/night cycle spans approximately 14 Earth days each, requiring systems to survive and operate through extended darkness and extreme cold. Lunar dust presents severe challenges due to its extremely abrasive and adhesive properties. The dust adheres to and contaminates optical surfaces, interferes with mechanical systems, and complicates thermal control. Combined with 1/6 Earth gravity affecting molten metal behavior and convection patterns, these factors create a uniquely challenging welding environment. Operational constraints include limited power availability from solar or nuclear sources, strict mass and volume restrictions for transported equipment, need for long-term reliability with minimal maintenance, and limited real-time communication with Earth due to 2.6 second signal delays. Systems must operate autonomously or be compatible with astronaut operation while wearing bulky Extravehicular Activity (EVA) suits.