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  1. Free, publicly-accessible full text available February 1, 2023
  2. Abstract We present details of a high-accuracy absolute scalar magnetometer based on pulsed proton NMR. The B-field magnitude is determined from the precession frequency of proton spins in a cylindrical sample of water after accounting for field perturbations from probe materials, sample shape, and other corrections. Features of the design, testing procedures, and corrections necessary for qualification as an absolute scalar magnetometer are described. The device was tested at B = 1.45 T but can be modified for a range exceeding 1–3 T. The magnetometer was used to calibrate other NMR magnetometers and measure absolute magnetic field magnitudes to anmore »accuracy of 19 parts per billion as part of a measurement of the muon magnetic moment anomaly at Fermilab.« less
    Free, publicly-accessible full text available December 1, 2022