"LESTR is the first mechanical test rig that avoids challenges associated with cryogenic fluids."
— Ariel Dimston, Technical Lead
NASA Develops New Rig to Test Materials at Cryogenic Temperatures Without Liquids
NASA's Glenn Research Center has developed a groundbreaking machine called the Lunar Environment Structural Test Rig (LESTR), capable of testing materials and electronics at temperatures as low as 40 Kelvin (approximately -388°F) without the use of liquid cryogens.
How It Works
Instead of relying on liquid nitrogen or helium, LESTR uses a cryocooler to create a dry vacuum environment. This innovation eliminates the need for specialized handling and safety equipment typically required for cryogenic fluids, reducing both safety requirements and operational costs.
Key Developments
- LESTR 1: The first version has been delivered to Fort Wayne Metals in Indiana. It will be used to test shape memory alloys for future rover applications.
- LESTR 2: A second version of the rig is currently under construction.
- Development Timeline: The rig was developed over two years by NASA engineers.
Mission-Critical Materials
Dr. Santo Padula II, Principal Investigator for LESTR, noted the program's primary goal: developing a shape memory alloy that remains functional at 40 Kelvin for rover missions to the Moon and Mars.
"The goal is to develop a shape memory alloy functional at 40 Kelvin for rover missions to the Moon and Mars."
— Dr. Santo Padula II, Principal Investigator
Why This Matters
Temperature extremes on the Moon—especially at the lunar South Pole—and Mars require materials that can withstand wide swings in temperature. Traditional testing methods rely on liquid cryogens, which demand specialized handling, storage, and safety equipment. By removing that requirement, LESTR makes advanced materials testing more accessible and efficient.
Beyond LESTR
NASA Glenn maintains a suite of other facilities that simulate space vacuum, microgravity, Venus conditions, and lunar/Martian terrain, supporting a wide range of deep-space exploration technologies.