Accession Number:

AD0621191

Title:

MUTUAL INDUCTANCE BRIDGE FOR AC SUSCEPTIBILITY MEASUREMENTS AT LOW FREQUENCIES,

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE NATIONAL MAGNET LAB

Personal Author(s):

Report Date:

1964-10-02

Pagination or Media Count:

4.0

Abstract:

A mutual inductance bridge for measuring ac magnetic susceptibility at low frequencies, using standard components, is described. The equivalent of a decade mutual indicator is achieved by using a commercial decade autotransformer in combination with a small fixed mutual inductor. The Gertsch RT-61 transformer is used at 30-400 cps and lower, while the RT-60 is used at approx 1 kc. Both transformers have a nominal accuracy of 0.001, which is more than sufficient in this use. A lownoise preamplifier followed by a lock-in amplifier is used for null detection. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE