Title :
Low magnetic field measurement with a reversed-field electron-spin-resonance magnetometer
Author :
Shirai, Terumitsu
Author_Institution :
Calibration Lab., Japan Electr. Meters Inspection Corp., Tokyo, Japan
fDate :
11/1/2000 12:00:00 AM
Abstract :
An effective method of measuring low magnetic fields is presented. In this method, the magnetic field direction is reversed periodically so that the effects of external magnetic fields, such as the earth´s magnetism, are removed. The usefulness of the method is investigated by using a split coil magnetic field source and an electron-spin-resonance magnetometer. A magnetic field of 10 mT can be measured with an uncertainty of less than 0.2 μT, i.e., 20 ppm
Keywords :
EPR spectrometers; magnetic field measurement; magnetometers; measurement uncertainty; 10 mT; external magnetic field effect removal; low magnetic field measurement; magnetic field direction periodic reversal; measurement uncertainty; reversed-field electron-spin-resonance magnetometer; split coil magnetic field source; Coils; Electric variables measurement; Inspection; Magnetic field measurement; Magnetic resonance; Magnetic shielding; Magnetometers; Nuclear magnetic resonance; Paramagnetic resonance; Watthour meters;
Journal_Title :
Magnetics, IEEE Transactions on
