2-G Cryogenic Magnetometer

Here is the center of our operation. This machine measures the magnetic field (actually the current induced by that magnetic field) of a sample put inside of it. The machine keeps a near 0 strength magnetic field by being surrounded with a superconducting shield. The combination of that and clever sensors allows us to measure fields as small as 1/10,000 the strength of the earth's field! It is quite powerful.

The machine itself just sits there while things move around it. Faintly in the background you may hear a faint pulse, almost like a heart beat, that works day and night to pump liquid helium keeping the magnetometer cool. It functions at approximately 4 degrees Kelvin or -450F! You wouldn't want to put your hand inside.

Above and hidden under the black shielding are instruments that are also used to process samples.  What you cannot see are AF coils, which produce an alternating field to demagnify a sample; susceptibility meter, that measures the ability of a sample to take an external field; and IRM and ARM coils, which can impart a field onto a sample.

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