Quenching
A quench is basically a sudden loss of
the main magnetic field and may occur intentionally or unintentionally. Stored
electrical energy in the NbTi winding will be dissipated as heat if the
superconducting process fails. This heat will cause other parts of the windings
to rise above their maximum rated temperature and this will propagate the
effect throughout the magnet. This will result in a sudden loss of the B0
field and the loss of the cryogen. A safety feature of any MRI system is the
presence of quench-pipes that are vented outside the building and this prevents
cold burns and suffocation in the event of a quench .
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