Abstract

The nuclear magnetic resonance (NMR) magnetometer described here measured homogeneous magnetic fields at a ppm level precision. It offers automatic frequency tracking and digital read-out of the measured magnetic field strength, and is easier to use and much cheaper than existing commercial instruments of similar versatility. It consists of a dual-width NIM plug-in, a probe amplifier box and various probes. Fields between 1 kG and 21 kG can be measured with four proton probes, and two deuteron probes are used from 20 kG to 68 kG. The corresponding six field ranges overlap comfortably. The search and frequency tracking range is a few percent of full scale; the coarse adjustment of the frequency has to be done manually.

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