Rotating Commutator High‐Sensitivity Fluxmeter

A commutator driven by a 1800‐rpm motor switches and restores the state of a magnetic sample once each revolution. An overdamped ballistic galvanometer integrates the induced voltage and displays a flux change due to the applied switching pulse. Since there is one flux change per revolution, a large...

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Bibliographic Details
Published in:Review of scientific instruments 1962-10, Vol.33 (10), p.1058-1062
Main Authors: Horst, R. L., Oberg, Paul E.
Format: Article
Language:English
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Summary:A commutator driven by a 1800‐rpm motor switches and restores the state of a magnetic sample once each revolution. An overdamped ballistic galvanometer integrates the induced voltage and displays a flux change due to the applied switching pulse. Since there is one flux change per revolution, a large number of revolutions results in a large deflection due to the addition of all the flux changes. This fluxmeter has a sensitivity of 4.61 Mx‐turns/cm/min of operating time. With this fluxmeter it is possible to measure magnetization curves and hysteresis loops of very small magnetic samples. The experimental error in the flux measurement is 4%.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1717682