Improved NMR Probe for Magnetic Field Measurements

Abstract

A small, simple, transistorized, marginal‐oscillator type nuclear magnetic resonance (NMR) spectrometer has been developed for high resolution mapping of magnetic fields in relatively inaccessible locations, such as the interior of superconducting solenoids. With a probe volume of 8×10⁻⁶ liter, the device is able to give magnetic flux‐density measurements to an accuracy of 2 parts in 10⁶ with a spatial resolution of about 1 mm. Remote operation of all controls adds considerably to its versatility.