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A magnetic field measurement technique using a miniature transducerThe development, fabrication, and application of a magnetometer are described. The magnetometer has a miniature transducer and is capable of automatic scanning. The magnetometer described here is capable of detecting static magnetic fields as low as 1.6 A/m and its transducer has an active area 0.64 mm by 0.76 mm. Thin and rugged, the transducer uses wire, 0.05 mm in diameter, which is plated with a magnetic film, enabling measurement of transverse magnetic fields as close as 0.08 mm from a surface. The magnetometer, which is simple to operate and has a fast response, uses an inexpensive clip-on milliammeter (commonly found in most laboratories) for driving and processing the electrical signals and readout. A specially designed transducer holding mechanism replaces the XY recorder ink pen; this mechanism provides the basis for an automatic scanning technique. The instrument has been applied to the measurements of magnetic fields arising from remanent magnetization in experimental plated-wire memory planes and regions of magnetic activity in geological rock specimens.
Document ID
19740024776
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Fales, C. L., Jr. (NASA Langley Research Center Hampton, VA, United States)
Breckenridge, R. A. (NASA Langley Research Center Hampton, VA, United States)
Debnam, W. J., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TN-D-7746
L-9701
Accession Number
74N32889
Funding Number(s)
PROJECT: RTOP 502-03-51-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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