Meet the Probes
Without an instrument called a probe, our world-record magnets would be about as useful as a power drill without a bit, thread without a needle or a safe without a key.
Magnet probes are at once very simple and very complex. On the simple end, they are essentially sticks – about as tall as the scientists who use them – that allow researchers to place their experiment inside the magnet's field.
This probe allows biologists to study health problems such as migraines and head injuries using live animals as large as rats, making our 900 MHz magnet the largest MRI machine in the world.