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.
argon
From Physics World, June 12, 2019: Physics World posts a video recorded inside the ProtoDUNE neutrino detector by the particle physicist and vocalist Anastasia Basharina-Freshville, who sing-explains why the noble gas is used to detect the elusive particles.
The Deep Underground Neutrino Experiment is advancing technology commonly used in dark matter experiments—and scaling it up to record-breaking sizes.