Cyclotron

A cyclotron was a device found in laboratories of which both the First Doctor and Ian Chesterton were familiar. When the Morpho hypnotised them, they both imagined seeing a cyclotron in the "laboratory" which they were provided. (TV: "The Velvet Web")

The Wenley Moor nuclear research facility used a cyclotron in its experiments. (TV: Doctor Who and the Silurians)