• DocumentCode
    952606
  • Title

    A nuclear free precession magnetometer using optically polarized He3gas

  • Author

    Slocum, Robert E. ; Marton, Bela I.

  • Author_Institution
    Texas Instruments, Incorporated, Dallas, Texas.
  • Volume
    10
  • Issue
    3
  • fYear
    1974
  • fDate
    9/1/1974 12:00:00 AM
  • Firstpage
    528
  • Lastpage
    531
  • Abstract
    Free precession in the earth\´s magnetic field by optically polarized He3nuclei has been observed for the first time. A He3nuclear magnetometer utilizing this effect was fabricated and evaluated. A unique characteristic of the He3nuclei is very long transverse relaxation times which are found to range from 103to 105seconds. The He3sensor has a signal-to-noise ratio comparable to conventional proton magnetometers, but is expected to have improved accuracy and a lower operating power requirement. A technique is described for overcoming the effects of radiation damping in order to utilize these very long relaxation times in the magnetometer. The He3magnetometer is demonstrated to have a sensitivity of 1.0 \\times 10^{-6} G by comparison with a locked-oscillator He4magnetometer.
  • Keywords
    Magnetic resonance; Magnetometers; Earth; Helium; Magnetic fields; Magnetic sensors; Magnetometers; Optical polarization; Optical sensors; Protons; Sensor phenomena and characterization; Signal to noise ratio;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1974.1058463
  • Filename
    1058463
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=952606