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posted Feb 13 '10 at 10:31

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5771

Is it safe to do levitation demo with superconducting NMR magnets?

We do this trick with our 800 MHz magnet often to impress some folks:

Remove the probe and plug bore of the magnet with a rubber cork. Take a donut-shaped disk made of aluminum, put it right under the magnet an let it hang there and slowly fall to the ground.

My question is - can field induced by moving an external conducting object like that disk affect the superconductor and cause a quench?

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posted Feb 13 '10 at 10:32

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5771

Is it safe to do levitation demo with superconducting NMR magnets?

We do this trick with our 800 MHz Oxford Instruments-built magnet often to impress some folks:

Remove the probe and plug bore of the magnet with a rubber cork. Take a donut-shaped disk made of aluminum, put it right under the magnet an let it hang there and slowly fall to the ground.

My question is - can field induced by moving an external conducting object like that disk affect the superconductor and cause a quench?

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