A Magnetic Field Strength Meter Using the Proton Magnetic Moment

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Abstract
A simple, portable instrument is described which employs the nuclear absorption method and the known value of the protonmagnetic moment to determine magnetic field strength. No known fields and no geometrical calculations are required for calibration. The range covered by the present instrument is approximately 3000 to 19,000 gauss. No upper limit is inherent in the method. Homogeneity is required over a small cylindrical volume. Absolute accuracy of better than ±0.2 percent is obtainable, depending only on precise measurement of frequency. Higher accuracy is possible in comparing fields and in measuring field changes.
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