From the California News Times, June 9, 2021: There is a new robotics project at Fermilab called Argonaut and its mission is to sail into a sea of liquid argon kept at minus 193 degrees Celsius to monitor the condition inside the ultra-low temperature particle detector.
Argonaut
From Laboratory Equipment, May 31, 2021: Fermilab engineer Bill Pellico wondered if it would be possible to make the interior cameras movable using liquid argon detectors to inspect the inside of detectors.
Fermilab scientists are developing one of the most cold-tolerant robots ever made so they can monitor the interiors of particle detectors. The project has already garnered some interest from engineers at other research institutions, including NASA.