Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-Accuracy Absolute Magnetometry with Application to the Fermilab
  Muon $g-2$ Experiment   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 an accuracy of 19 parts per billion as part of a
measurement of the muon magnetic moment anomaly at Fermilab.

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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: adap-org