Author:
Flay D.,Kawall D.,Chupp T.,Corrodi S.,Farooq M.,Fertl M.,George J.,Grange J.,Hong R.,Osofsky R.,Ramachandran S.,Swanson E.,Winter P.
Abstract
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 an accuracy
of 19 parts per billion as part of a measurement of the muon
magnetic moment anomaly at Fermilab.
Subject
Mathematical Physics,Instrumentation
Cited by
4 articles.
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