Replacing massive magnets 200 feet underground using only remote controls
In short: Watch how physicists swap out critical components of a particle accelerator without ever entering the high-radiation zone. This time-lapse captures the precision engineering required to maintain the machines that produce some of our most fundamental physics data.
Fermilab utilizes magnetic focusing horns to steer secondary particles into concentrated beams, which eventually decay into neutrinos. These components endure extreme conditions, including heat, radiation, and mechanical stress, while pulsing 200,000 amperes of current every 1.2 seconds.
Because the environment is too hazardous for humans, all material movement during replacement is performed via remote-control cranes and cameras. The video features a horn installed in 2008 that served for over 12 years, focusing more than 129 million pulses before its 2020 replacement.
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