Liquid helium is essential because it cools the coils to the point that the current can run through it. As such, they are vital to the design of MRI machines that are used all over the world.

THE abnormally high heat conductivity of helium II below the λ-point, as first observed by Keesom, suggested to me the possibility of an explanation in terms of convection currents. This ...

A drop of liquid helium cooled to an extremely low temperature can be made to float in a vacuum for an indefinitely long time. In this state, it could serve as a powerful mini-laboratory for ...

Until and unless someone actually discovers a room-temperature superconductor, liquid helium, which stays liquid at −452.20 degrees Fahrenheit, will remain a reliable way to keep superconducting ...

About 2,000 liters of liquid helium is required to cool down the MRI's superconducting magnets, which generate the high-resolution images of the human body and make the machines operate efficiently.

More information: Hala Siddiq et al, Visualization of oscillatory electron dynamics on the surface of liquid helium, Physical Review B (2023). DOI: 10.1103/PhysRevB.107.104501 Journal information ...

Liquid helium, the coldest element on Earth, is needed to keep the magnets in MRI machines running. Without it, doctors would lose a critical medical tool.