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A superconducting galvanometer

Published online by Cambridge University Press:  24 October 2008

A. B. Pippard  and
G. T. Pullan
A. B. Pippard
Affiliation:
Rolay Society Mond LaboratoryCambridge
G. T. Pullan
Affiliation:
Rolay Society Mond LaboratoryCambridge
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Abstract

A superconducting tangent galvanometer suitable for the measurement of thermoelectric voltages in circuits of resistance about 10−7 ohm is described. The inductance has been kept low by the use of only a single turn in each of the deflecting coils, but a high sensitivity has been attained by reducing the controlling field to about 0·01 gauss. The theory of operation of such a galvanometer in circuits of low resistance is discussed; the actual behaviour of the instrument is in satisfactory agreement with the theory. The galvanometer will detect a current of 10−5 A. corresponding to an e.m.f. of 10−12 V.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 48 , Issue 1 , January 1952 , pp. 188 - 196
Copyright
Copyright © Cambridge Philosophical Society 1952

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References

REFERENCES

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